diff --git a/src/main/kotlin/net/deliciousreya/minecraftportal/MinecraftPortalPlugin.kt b/src/main/kotlin/net/deliciousreya/minecraftportal/MinecraftPortalPlugin.kt
index 9e31644..3a2209c 100644
--- a/src/main/kotlin/net/deliciousreya/minecraftportal/MinecraftPortalPlugin.kt
+++ b/src/main/kotlin/net/deliciousreya/minecraftportal/MinecraftPortalPlugin.kt
@@ -1,15 +1,19 @@
 package net.deliciousreya.minecraftportal
 
 import com.destroystokyo.paper.event.block.BlockDestroyEvent
+import net.deliciousreya.minecraftportal.extensions.COLOR_NAME_MAPPING
 import net.deliciousreya.minecraftportal.extensions.MID_BLOCK
 import net.deliciousreya.minecraftportal.extensions.plus
 import net.deliciousreya.minecraftportal.model.DOOR_TYPES
 import net.deliciousreya.minecraftportal.model.PortalDataStore
 import net.deliciousreya.minecraftportal.model.PortalFrame
 import net.deliciousreya.minecraftportal.model.findPortalFrameConnectedTo
+import org.bukkit.Material
 import org.bukkit.Sound
 import org.bukkit.block.Block
 import org.bukkit.block.data.type.Door
+import org.bukkit.command.Command
+import org.bukkit.command.CommandSender
 import org.bukkit.entity.Entity
 import org.bukkit.entity.Player
 import org.bukkit.event.EventHandler
@@ -21,6 +25,7 @@ import org.bukkit.event.player.PlayerInteractEvent
 import org.bukkit.event.player.PlayerMoveEvent
 import org.bukkit.plugin.java.JavaPlugin
 import org.bukkit.potion.PotionEffectType
+import java.lang.IllegalStateException
 
 class MinecraftPortalPlugin() : JavaPlugin(), Listener
 {
@@ -31,6 +36,8 @@ class MinecraftPortalPlugin() : JavaPlugin(), Listener
         portals.loadFromAndAutoSaveTo(server, dataFolder.resolve("portal_data.binproto"), dataFolder.resolve("portal_data.binproto.bak"))
         portals.validateWorldOnStartup(logger)
         portals.launchEffectsOnStartup(this)
+        val setColorCommand = getCommand("portalcolor") ?: throw IllegalStateException("portalcolor command was missing")
+        setColorCommand.setExecutor { sender, _, _, args -> onPortalColor(sender, args) }
         server.pluginManager.registerEvents(this, this)
     }
 
@@ -39,8 +46,65 @@ class MinecraftPortalPlugin() : JavaPlugin(), Listener
         portals.unload()
     }
 
+    fun onPortalColor(sender: CommandSender, args: Array<String>): Boolean {
+        val argsList = if (args.isEmpty() && sender is Player) {
+            listOf("show")
+        } else {
+            args.asList()
+        }
+        if (argsList.isEmpty() || args.size > 2) {
+            sender.sendMessage("You must specify one or two arguments.")
+            return false
+        }
+        val colorString = if (argsList.size == 1) {
+            argsList[0]
+        } else {
+            argsList[1]
+        }
+        val playerString = when {
+            argsList.size == 2 -> {
+                argsList[0]
+            }
+            sender is Player -> {
+                sender.name
+            }
+            else -> {
+                null
+            }
+        }
+        if (playerString == null) {
+            sender.sendMessage("Only players can set their own color with the one-arg form.")
+            return false
+        }
+        if (colorString == "show") {
+            if (sender is Player && playerString == sender.name) {
+                sender.sendMessage("Portals you create are marked with ${portals.getColorFor(playerString).name}.")
+            } else {
+                sender.sendMessage("Portals created by $playerString are marked with ${portals.getColorFor(playerString).name}.")
+            }
+            return true
+        }
+        if (playerString != sender.name && !sender.isOp) {
+            sender.sendMessage("Only ops can set other players' colors with the two-arg form.")
+            return false
+        }
+        val color = COLOR_NAME_MAPPING[colorString]
+        if (color == null) {
+            sender.sendMessage("I don't know that color. Are you sure it's one of the dye colors?")
+            return false
+        }
+        portals.setColorFor(playerString, color)
+        if (sender is Player && playerString == sender.name) {
+            sender.sendMessage("Your portals will now be marked with ${portals.getColorFor(playerString).name}.")
+        } else {
+            sender.sendMessage("Portals created by $playerString will now be marked with ${portals.getColorFor(playerString).name}")
+        }
+        return true
+    }
+
     @EventHandler
     fun onBlockPlaced(e: BlockPlaceEvent) {
+        e.player.name
         if (e.block.type in PortalFrame.State.INACTIVE.allValidBlocks) {
             val newPortal = findPortalFrameConnectedTo(
                 e.block,
@@ -50,6 +114,9 @@ class MinecraftPortalPlugin() : JavaPlugin(), Listener
                 val replacedPortal = portals.activateAndReplacePortal(newPortal)
                 val otherPortal = portals.getOtherPortal(newPortal)
                 newPortal.activate()
+                if (newPortal.color == Material.GLASS) {
+                    newPortal.color = portals.getColorFor(e.player.name)
+                }
                 replacedPortal?.deactivate()
                 if (otherPortal != null) {
                     newPortal.open()
@@ -123,19 +190,15 @@ class MinecraftPortalPlugin() : JavaPlugin(), Listener
         }
     }
 
-    fun onPlayerMove(e: PlayerMoveEvent) {
-        val player = e.player
-        val oldLocation = e.from
-        val portal = portals.isLocationInPortalChamber(oldLocation) ?: return
-        val newLocation = e.to ?: return
-        if (oldLocation.world != newLocation.world || oldLocation.toVector() !in portal.portalInsideBoundingBox) {
-            cancelTeleportFor(player)
-        }
-    }
-
-    private fun cancelTeleportFor(entity: Entity) {
-
-    }
+    //fun onPlayerMove(e: PlayerMoveEvent) {
+        //val player = e.player
+        //val oldLocation = e.from
+        //val portal = portals.isLocationInPortalChamber(oldLocation) ?: return
+        //val newLocation = e.to ?: return
+        //if (oldLocation.world != newLocation.world || oldLocation.toVector() !in portal.portalInsideBoundingBox) {
+            // TODO: cancelTeleportFor(player)
+        //}
+    //}
 
     fun onDestroyedBlock(block: Block) {
         if (block.type !in PortalFrame.State.ACTIVE.allValidBlocks) {
diff --git a/src/main/kotlin/net/deliciousreya/minecraftportal/extensions/Material.kt b/src/main/kotlin/net/deliciousreya/minecraftportal/extensions/Material.kt
index 8687744..f8f7f25 100644
--- a/src/main/kotlin/net/deliciousreya/minecraftportal/extensions/Material.kt
+++ b/src/main/kotlin/net/deliciousreya/minecraftportal/extensions/Material.kt
@@ -6,6 +6,44 @@ import net.deliciousreya.minecraftportal.proto.PortalSaveDataProtos
 import org.bukkit.Material
 import java.lang.IllegalStateException
 
+val COLOR_NAME_MAPPING: ImmutableBiMap<String, Material> = ImmutableBiMap.builder<String, Material>()
+    .put("white", Material.WHITE_STAINED_GLASS)
+    .put("red", Material.RED_STAINED_GLASS)
+    .put("orange", Material.ORANGE_STAINED_GLASS)
+    .put("pink", Material.PINK_STAINED_GLASS)
+    .put("yellow", Material.YELLOW_STAINED_GLASS)
+    .put("lime", Material.LIME_STAINED_GLASS)
+    .put("green", Material.GREEN_STAINED_GLASS)
+    .put("lightblue", Material.LIGHT_BLUE_STAINED_GLASS)
+    .put("cyan", Material.CYAN_STAINED_GLASS)
+    .put("blue", Material.BLUE_STAINED_GLASS)
+    .put("magenta", Material.MAGENTA_STAINED_GLASS)
+    .put("purple", Material.PURPLE_STAINED_GLASS)
+    .put("brown", Material.BROWN_STAINED_GLASS)
+    .put("gray", Material.GRAY_STAINED_GLASS)
+    .put("lightgray", Material.LIGHT_GRAY_STAINED_GLASS)
+    .put("black", Material.BLACK_STAINED_GLASS)
+    .build()
+
+val COLOR_MAPPING: ImmutableBiMap<Material, PortalSaveDataProtos.Portal.Color> = ImmutableBiMap.builder<Material, PortalSaveDataProtos.Portal.Color>()
+    .put(Material.WHITE_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.WHITE)
+    .put(Material.RED_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.RED)
+    .put(Material.ORANGE_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.ORANGE)
+    .put(Material.PINK_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.PINK)
+    .put(Material.YELLOW_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.YELLOW)
+    .put(Material.LIME_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.LIME)
+    .put(Material.GREEN_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.GREEN)
+    .put(Material.LIGHT_BLUE_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.LIGHT_BLUE)
+    .put(Material.CYAN_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.CYAN)
+    .put(Material.BLUE_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.BLUE)
+    .put(Material.MAGENTA_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.MAGENTA)
+    .put(Material.PURPLE_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.PURPLE)
+    .put(Material.BROWN_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.BROWN)
+    .put(Material.GRAY_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.GRAY)
+    .put(Material.LIGHT_GRAY_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.LIGHT_GRAY)
+    .put(Material.BLACK_STAINED_GLASS, PortalSaveDataProtos.Portal.Color.BLACK)
+    .build()
+
 val MINERAL_MAPPING: ImmutableBiMap<Material, PortalSaveDataProtos.Portal.Mineral> = ImmutableBiMap.builder<Material, PortalSaveDataProtos.Portal.Mineral>()
     .put(Material.COAL_BLOCK, PortalSaveDataProtos.Portal.Mineral.COAL)
     .put(Material.REDSTONE_BLOCK, PortalSaveDataProtos.Portal.Mineral.REDSTONE)
@@ -18,9 +56,17 @@ val MINERAL_MAPPING: ImmutableBiMap<Material, PortalSaveDataProtos.Portal.Minera
     .build()
 
 fun Material.toMineralProto(): PortalSaveDataProtos.Portal.Mineral {
-    return MINERAL_MAPPING[this] ?: throw DeserializationException("Not a mineral: ${this}")
+    return MINERAL_MAPPING[this] ?: throw DeserializationException("Not a mineral: $this")
+}
+
+fun Material.toColorProto(): PortalSaveDataProtos.Portal.Color {
+    return COLOR_MAPPING[this] ?: throw DeserializationException("Not a color: $this")
 }
 
 fun PortalSaveDataProtos.Portal.Mineral.toMaterial(): Material {
-    return MINERAL_MAPPING.inverse()[this] ?: throw DeserializationException("Not a material: ${this}")
+    return MINERAL_MAPPING.inverse()[this] ?: throw DeserializationException("Not a material: $this")
+}
+
+fun PortalSaveDataProtos.Portal.Color.toMaterial(): Material {
+    return COLOR_MAPPING.inverse()[this] ?: throw DeserializationException("Not a material: $this")
 }
\ No newline at end of file
diff --git a/src/main/kotlin/net/deliciousreya/minecraftportal/model/Portal.kt b/src/main/kotlin/net/deliciousreya/minecraftportal/model/Portal.kt
index cb71219..92ae23c 100644
--- a/src/main/kotlin/net/deliciousreya/minecraftportal/model/Portal.kt
+++ b/src/main/kotlin/net/deliciousreya/minecraftportal/model/Portal.kt
@@ -1,20 +1,30 @@
 package net.deliciousreya.minecraftportal.model
 
-import net.deliciousreya.minecraftportal.extensions.toLocation
-import net.deliciousreya.minecraftportal.extensions.toMaterial
-import net.deliciousreya.minecraftportal.extensions.toMineralProto
-import net.deliciousreya.minecraftportal.extensions.toProto
+import net.deliciousreya.minecraftportal.extensions.*
 import net.deliciousreya.minecraftportal.proto.PortalSaveDataProtos
 import org.bukkit.Material
 import org.bukkit.Server
 import org.bukkit.plugin.Plugin
-import org.bukkit.scheduler.BukkitRunnable
 import java.lang.IllegalArgumentException
 
-fun PortalSaveDataProtos.Portal.toPortal(server: Server, portalTypes: Map<Material, PortalType>): Portal {
-    val portalType = portalTypes[mineral.toMaterial()] ?: throw IllegalArgumentException("No portal type for $mineral")
-    val result = Portal(PortalFrame(lowerLeftFrontCorner.toLocation(server), exitDirection.toDirection()), portalType)
-    return result
+fun PortalSaveDataProtos.Portal.Mineral.asColor(): PortalSaveDataProtos.Portal.Color {
+    if (this == PortalSaveDataProtos.Portal.Mineral.UNKNOWN_MINERAL) {
+        throw IllegalArgumentException("No portal color for $this")
+    }
+    val material = toMaterial()
+    val matchingGlass = MINERAL_TYPES[material] ?: throw IllegalArgumentException("No portal color for $this: no glass matches")
+    return COLOR_MAPPING[matchingGlass] ?: throw IllegalArgumentException("No portal color for $this: no color matches")
+}
+
+fun PortalSaveDataProtos.Portal.toPortal(server: Server, portalTypes: Map<Material, Map<Material, PortalType>>): Portal {
+    val mineralMap = portalTypes[mineral.toMaterial()] ?: throw IllegalArgumentException("No portal type for $mineral")
+    val effectiveColor = if (color == PortalSaveDataProtos.Portal.Color.UNKNOWN_COLOR) {
+        mineral.asColor()
+    } else {
+        color
+    }
+    val portalType = mineralMap[effectiveColor.toMaterial()] ?: throw IllegalArgumentException("No portal type for $color")
+    return Portal(PortalFrame(lowerLeftFrontCorner.toLocation(server), exitDirection.toDirection()), portalType)
 }
 
 class Portal(val frame: PortalFrame, val type: PortalType) {
@@ -41,6 +51,7 @@ class Portal(val frame: PortalFrame, val type: PortalType) {
             .setLowerLeftFrontCorner(frame.lowerLeftFrontCorner.toProto())
             .setExitDirection(frame.direction.toProto())
             .setMineral(frame.mineral.toMineralProto())
+            .setColor(frame.color.toColorProto())
             .build()
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalDataStore.kt b/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalDataStore.kt
index 659fc0f..bf02a9f 100644
--- a/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalDataStore.kt
+++ b/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalDataStore.kt
@@ -1,8 +1,12 @@
 package net.deliciousreya.minecraftportal.model
 
+import com.google.common.collect.ImmutableList
 import com.google.common.collect.ImmutableMap
 import com.google.protobuf.InvalidProtocolBufferException
+import net.deliciousreya.minecraftportal.extensions.COLOR_MAPPING
 import net.deliciousreya.minecraftportal.extensions.MINERAL_MAPPING
+import net.deliciousreya.minecraftportal.extensions.toColorProto
+import net.deliciousreya.minecraftportal.extensions.toMaterial
 import net.deliciousreya.minecraftportal.proto.PortalSaveDataProtos
 import org.bukkit.Location
 import org.bukkit.Material
@@ -16,17 +20,27 @@ import java.util.logging.Logger
 class PortalDataStore (){
     var saveDataTo: File? = null
     var useBackup: File? = null
-    val portalTypes: ImmutableMap<Material, PortalType>
+    private val userColors: MutableMap<String, Material> = mutableMapOf()
+    private val portalTypes: ImmutableMap<Material, ImmutableMap<Material, PortalType>>
+    private val allPortals: ImmutableList<PortalType>
     init {
-        val portalTypesBuilder = ImmutableMap.builder<Material, PortalType>()
+        val allPortalsBuilder = ImmutableList.builder<PortalType>()
+        val portalTypesBuilder = ImmutableMap.builder<Material, ImmutableMap<Material, PortalType>>()
         for (mineralType in MINERAL_MAPPING.keys) {
-            portalTypesBuilder.put(mineralType, PortalType(mineralType))
+            val colors = ImmutableMap.Builder<Material, PortalType>()
+            for (color in COLOR_MAPPING.keys) {
+                val portalType = PortalType(mineralType, color)
+                colors.put(color, portalType)
+                allPortalsBuilder.add(portalType)
+            }
+            portalTypesBuilder.put(mineralType, colors.build())
         }
         portalTypes = portalTypesBuilder.build()
+        allPortals = allPortalsBuilder.build()
     }
 
     fun isLocationInPortalOrChamber(location: Location): PortalFrame? {
-        for (type in this.portalTypes.values) {
+        for (type in this.allPortals) {
             if (type.isEmpty) {
                 continue
             }
@@ -39,7 +53,7 @@ class PortalDataStore (){
     }
 
     fun isLocationInPortalChamber(location: Location): PortalFrame? {
-        for (type in this.portalTypes.values) {
+        for (type in this.allPortals) {
             if (type.isEmpty) {
                 continue
             }
@@ -90,7 +104,7 @@ class PortalDataStore (){
     }
 
     fun validateWorldOnStartup(logger: Logger) {
-        for (portalType in this.portalTypes.values) {
+        for (portalType in this.allPortals) {
             val oldPortal = portalType.oldestActivePortal
             val newPortal = portalType.newestActivePortal
             if (newPortal != null && !validatePortal(newPortal)) {
@@ -106,11 +120,11 @@ class PortalDataStore (){
     }
 
     fun validatePortal(portal: Portal): Boolean {
-        return portal.frame.mineral == portal.type.mineral && portal.frame.isActivePortal()
+        return portal.frame.mineral == portal.type.mineral && portal.frame.color == portal.type.color && portal.frame.isActivePortal()
     }
 
     fun launchEffectsOnStartup(plugin: Plugin) {
-        for (portalType in this.portalTypes.values) {
+        for (portalType in this.allPortals) {
             startEffectsFor(portalType, plugin)
         }
     }
@@ -174,7 +188,7 @@ class PortalDataStore (){
     }
 
     fun getPortalType(frame: PortalFrame): PortalType {
-        return portalTypes[frame.mineral] ?: throw IllegalArgumentException("There are no portals of type ${frame.mineral}")
+        return portalTypes[frame.mineral]?.get(frame.color) ?: throw IllegalArgumentException("There are no portals of type ${frame.mineral}/${frame.color}")
     }
 
     /** Gets the other portal, if the given frame is one of the portals in a pair. */
@@ -185,7 +199,7 @@ class PortalDataStore (){
 
     /** Forgets all the data without actually affecting the world. */
     fun clear() {
-        for (portalType in this.portalTypes.values) {
+        for (portalType in this.allPortals) {
             portalType.oldestActivePortal?.stopEffects()
             portalType.newestActivePortal?.stopEffects()
             portalType.clear()
@@ -206,11 +220,14 @@ class PortalDataStore (){
             }
             olderPortal.type.loadPairedPortals(olderPortal, newerPortal)
         }
+        for (userData in proto.userDataList) {
+            userColors[userData.name] = userData.color.toMaterial()
+        }
     }
 
     fun toProto(): PortalSaveDataProtos.PortalSaveData {
         val builder = PortalSaveDataProtos.PortalSaveData.newBuilder()
-        for (portalType in this.portalTypes.values) {
+        for (portalType in this.allPortals) {
             when {
                 portalType.isEmpty -> {
                     // Nothing here to save. Just skip it.
@@ -223,6 +240,9 @@ class PortalDataStore (){
                 }
             }
         }
+        for (user in this.userColors.keys) {
+            builder.addUserData(PortalSaveDataProtos.UserData.newBuilder().setName(user).setColor(this.userColors[user]?.toColorProto()))
+        }
         return builder.build()
     }
 
@@ -233,4 +253,19 @@ class PortalDataStore (){
     fun stopTeleporting(portal: PortalFrame) {
         getPortalType(portal).cancelTeleportation()
     }
+
+    private val defaultColor = Material.GRAY_STAINED_GLASS
+
+    fun getColorFor(name: String): Material {
+        return userColors.getOrDefault(name, defaultColor)
+    }
+
+    fun setColorFor(name: String, color: Material) {
+        if (color == defaultColor) {
+            userColors.remove(name)
+        } else {
+            userColors[name] = color
+        }
+        onAfterChanged()
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalFrame.kt b/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalFrame.kt
index 16b1faa..c03373c 100644
--- a/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalFrame.kt
+++ b/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalFrame.kt
@@ -33,11 +33,11 @@ val MINERAL_TYPES: ImmutableMap<Material, Material> = ImmutableMap.Builder<Mater
 val DOOR_TYPES: ImmutableSet<Material> = ImmutableSet.of(ACACIA_DOOR, BIRCH_DOOR, DARK_OAK_DOOR, IRON_DOOR, JUNGLE_DOOR, OAK_DOOR, SPRUCE_DOOR)
 
 fun findPortalFrameConnectedTo(block:Block, state: PortalFrame.State): PortalFrame? {
-    when {
-        block.type in state.glassBlocks -> for (direction in PortalFrame.ExitDirection.values()) {
-            for (vector in direction.glassOffsets) {
+    for (blockSet in state.blockSets) {
+        for (direction in PortalFrame.ExitDirection.values()) {
+            for (offset in blockSet.offsets(direction)) {
                 val scanResult = checkPortalFrameAt(
-                    block.location.subtract(vector),
+                    block.location.subtract(offset),
                     direction,
                     state
                 )
@@ -46,28 +46,6 @@ fun findPortalFrameConnectedTo(block:Block, state: PortalFrame.State): PortalFra
                 }
             }
         }
-        block.type in state.doorBlocks -> for (direction in PortalFrame.ExitDirection.values()) {
-            for (vector in direction.doorOffsets) {
-                val scanResult = checkPortalFrameAt(
-                    block.location.subtract(vector),
-                    direction,
-                    state
-                )
-                if (scanResult != null) {
-                    return scanResult
-                }
-            }
-        }
-        block.type in state.mineralBlocks -> for (direction in PortalFrame.ExitDirection.values()) {
-            val scanResult = checkPortalFrameAt(
-                block.location.subtract(direction.mineralOffset),
-                direction,
-                state
-            )
-            if (scanResult != null) {
-                return scanResult
-            }
-        }
     }
     return null
 }
@@ -78,6 +56,10 @@ fun checkPortalFrameAt(location:Location, direction: PortalFrame.ExitDirection,
     if (mineral.type !in state.mineralBlocks) {
         return null
     }
+    val color = (location + direction.colorOffset).block
+    if (color.type !in state.colorBlocks) {
+        return null
+    }
     for (vector in direction.glassOffsets) {
         val block = (location + vector).block
         if (block.type !in state.glassBlocks) {
@@ -105,13 +87,20 @@ fun PortalSaveDataProtos.Portal.Direction.toDirection(): PortalFrame.ExitDirecti
 
 /** Information about a portal frame. */
 data class PortalFrame(val lowerLeftFrontCorner: Location, val direction: ExitDirection) {
-    enum class State(val glassBlocks: ImmutableSet<Material>, val doorBlocks: ImmutableSet<Material>, val mineralBlocks: ImmutableSet<Material>) {
-        ACTIVE(ImmutableSet.copyOf(MINERAL_TYPES.values),
+    enum class State(val glassBlocks: ImmutableSet<Material>, val colorBlocks: ImmutableSet<Material>, val doorBlocks: ImmutableSet<Material>, val mineralBlocks: ImmutableSet<Material>) {
+        ACTIVE(ImmutableSet.copyOf(MINERAL_TYPES.values), ImmutableSet.copyOf(COLOR_MAPPING.keys),
             DOOR_TYPES, ImmutableSet.copyOf(MINERAL_TYPES.keys)),
-        INACTIVE(ImmutableSet.of(GLASS),
+        INACTIVE(ImmutableSet.of(GLASS), ImmutableSet.builder<Material>().addAll(COLOR_MAPPING.keys).add(GLASS).build(),
             DOOR_TYPES, ImmutableSet.copyOf(MINERAL_TYPES.keys));
 
-        val allValidBlocks:ImmutableSet<Material> = ImmutableSet.Builder<Material>().addAll(glassBlocks).addAll(doorBlocks).addAll(mineralBlocks).build()
+        val allValidBlocks:ImmutableSet<Material> = ImmutableSet.Builder<Material>().addAll(glassBlocks).addAll(doorBlocks).addAll(mineralBlocks).addAll(colorBlocks).build()
+        data class BlockSet(val blockTypes: Set<Material>, val offsets: (direction: ExitDirection) -> List<Vector>)
+        val blockSets = listOf(
+            BlockSet(glassBlocks, offsets = { it.glassOffsets }),
+            BlockSet(doorBlocks, offsets = { it.doorOffsets }),
+            BlockSet(colorBlocks, offsets = { listOf(it.colorOffset) }),
+            BlockSet(mineralBlocks, offsets = { listOf(it.mineralOffset) })
+        )
     }
     /** The direction a player faces when exiting the portal. */
     enum class ExitDirection(val toRight: Vector, val toBack: Vector, val doorDirection: BlockFace, val protoEnum: PortalSaveDataProtos.Portal.Direction) {
@@ -143,8 +132,6 @@ data class PortalFrame(val lowerLeftFrontCorner: Location, val direction: ExitDi
             // left front wall
             UP,
             UP * 2,
-            // top front wall
-            UP * 3 + toRight,
             // right front wall
             UP + toRight * 2,
             UP * 2 + toRight * 2,
@@ -164,10 +151,11 @@ data class PortalFrame(val lowerLeftFrontCorner: Location, val direction: ExitDi
         )
 
         val mineralOffset: Vector = toRight
+        val colorOffset: Vector = UP * 3 + toRight
 
         val doorOffsets: ImmutableList<Vector> = ImmutableList.of(
-            Vector(0, 1, 0) + toRight,
-            Vector(0, 2, 0) + toRight
+            UP + toRight,
+            UP * 2 + toRight
         )
 
         fun toProto():PortalSaveDataProtos.Portal.Direction {
@@ -175,6 +163,7 @@ data class PortalFrame(val lowerLeftFrontCorner: Location, val direction: ExitDi
         }
     }
 
+
     val portalCenter = lowerLeftFrontCorner + direction.doorOffsets[0]
     val midCenter = portalCenter + MID_BLOCK
     val fullPortalBoundingBox = BoundingBox.of(lowerLeftFrontCorner.block, (lowerLeftFrontCorner + UP * 3 + direction.toRight * 2 + direction.toBack).block)
@@ -209,6 +198,11 @@ data class PortalFrame(val lowerLeftFrontCorner: Location, val direction: ExitDi
     }
 
     val mineral = (lowerLeftFrontCorner + direction.mineralOffset).block.type
+    var color: Material
+        get() = (lowerLeftFrontCorner + direction.colorOffset).block.type
+        set(newColor) {
+            (lowerLeftFrontCorner + direction.colorOffset).block.type = newColor
+        }
 
     fun open() {
         val block = portalCenter.block
diff --git a/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalType.kt b/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalType.kt
index b581443..c8564fb 100644
--- a/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalType.kt
+++ b/src/main/kotlin/net/deliciousreya/minecraftportal/model/PortalType.kt
@@ -4,10 +4,9 @@ import net.deliciousreya.minecraftportal.proto.PortalSaveDataProtos
 import org.bukkit.Location
 import org.bukkit.Material
 import org.bukkit.plugin.Plugin
-import java.lang.IllegalArgumentException
 import java.lang.IllegalStateException
 
-class PortalType(val mineral: Material) {
+class PortalType(val mineral: Material, val color: Material) {
     var oldestActivePortal: Portal? = null
     var newestActivePortal: Portal? = null
 
@@ -31,7 +30,7 @@ class PortalType(val mineral: Material) {
 
     fun addOrReplacePortal(portal: Portal): Portal? {
         if (portal.type != this) {
-            throw DeserializationException("Tried to add $portal which didn't belong to ${this}")
+            throw DeserializationException("Tried to add $portal which didn't belong to $this")
         }
         return when {
             this.isEmpty  -> {
@@ -54,23 +53,23 @@ class PortalType(val mineral: Material) {
 
     fun loadUnpairedPortal(portal: Portal) {
         if (!this.isEmpty) {
-            throw DeserializationException("Already have a value for ${this} when adding $portal")
+            throw DeserializationException("Already have a value for $this when adding $portal")
         }
         if (portal.type != this) {
-            throw DeserializationException("Tried to add $portal which didn't belong to ${this}")
+            throw DeserializationException("Tried to add $portal which didn't belong to $this")
         }
         this.oldestActivePortal = portal
     }
 
     fun loadPairedPortals(olderPortal: Portal, newerPortal: Portal) {
         if (!this.isEmpty) {
-            throw DeserializationException("Already have a value for ${this} when adding $olderPortal and $newerPortal")
+            throw DeserializationException("Already have a value for $this when adding $olderPortal and $newerPortal")
         }
         if (olderPortal.type != this) {
-            throw DeserializationException("Tried to add $olderPortal which didn't belong to ${this}")
+            throw DeserializationException("Tried to add $olderPortal which didn't belong to $this")
         }
         if (newerPortal.type != this) {
-            throw DeserializationException("Tried to add $newerPortal which didn't belong to ${this}")
+            throw DeserializationException("Tried to add $newerPortal which didn't belong to $this")
         }
         this.oldestActivePortal = olderPortal
         this.newestActivePortal = newerPortal
@@ -95,7 +94,7 @@ class PortalType(val mineral: Material) {
     }
 
     override fun toString():String {
-        return "PortalType{mineral=$mineral, oldestActivePortal=$oldestActivePortal, newestActivePortal=$newestActivePortal}"
+        return "PortalType{mineral=$mineral, color=$color, oldestActivePortal=$oldestActivePortal, newestActivePortal=$newestActivePortal}"
     }
 
     /**
diff --git a/src/main/proto/portal-save-data.proto b/src/main/proto/portal-save-data.proto
index e7f1c01..075c928 100644
--- a/src/main/proto/portal-save-data.proto
+++ b/src/main/proto/portal-save-data.proto
@@ -31,9 +31,29 @@ message Portal {
         IRON = 7;
         QUARTZ = 8;
     }
+    enum Color {
+        UNKNOWN_COLOR = 0;
+        WHITE = 1;
+        RED = 2;
+        ORANGE = 3;
+        PINK = 4;
+        YELLOW = 5;
+        LIME = 6;
+        GREEN = 7;
+        LIGHT_BLUE = 8;
+        CYAN = 9;
+        BLUE = 10;
+        MAGENTA = 11;
+        PURPLE = 12;
+        BROWN = 13;
+        GRAY = 14;
+        LIGHT_GRAY = 15;
+        BLACK = 16;
+    }
     Location lower_left_front_corner = 1;
     Direction exit_direction = 2;
     Mineral mineral = 3;
+    Color color = 4;
 }
 
 message PortalPair {
@@ -41,7 +61,13 @@ message PortalPair {
     Portal newer = 2;
 }
 
+message UserData {
+    string name = 1;
+    Portal.Color color = 2;
+}
+
 message PortalSaveData {
     repeated PortalPair paired_portals = 1;
     repeated Portal unpaired_portals = 2;
+    repeated UserData user_data = 3;
 }
\ No newline at end of file
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index d08f7fc..6484872 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1 +1,6 @@
-api-version: '1.13'
+api-version: '1.16'
+
+commands:
+  portalcolor:
+    description: Sets or gets the color of portals created by you or another player.
+    usage: "Usage: /portalcolor ([playername]) [show/white/red/orange/pink/yellow/lime/green/lightblue/cyan/blue/magenta/purple/brown/gray/lightgray/black]"