diff --git a/OpenRA.Mods.Common/Traits/Palettes/ColorPickerPalette.cs b/OpenRA.Mods.Common/Traits/Palettes/ColorPickerPalette.cs
index 11eccbb3a9..6d3af86990 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/ColorPickerPalette.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/ColorPickerPalette.cs
@@ -11,6 +11,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
 using OpenRA.Traits;
@@ -31,7 +32,6 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("The name of the palette to base off.")]
 		public readonly string BasePalette = null;
 
-		[FieldLoader.Require]
 		[Desc("Remap these indices to player colors.")]
 		public readonly int[] RemapIndex = Array.Empty<int>();
 
@@ -58,7 +58,7 @@ namespace OpenRA.Mods.Common.Traits
 		{
 			color = colorManager.Color;
 			var (_, h, s, _) = color.ToAhsv();
-			var remap = new PlayerColorRemap(info.RemapIndex, h, s);
+			var remap = new PlayerColorRemap(info.RemapIndex.Length == 0 ? Enumerable.Range(0, 256).ToArray() : info.RemapIndex, h, s);
 			wr.AddPalette(info.Name, new ImmutablePalette(wr.Palette(info.BasePalette).Palette, remap), info.AllowModifiers);
 		}
 
@@ -71,7 +71,7 @@ namespace OpenRA.Mods.Common.Traits
 
 			color = colorManager.Color;
 			var (_, h, s, _) = color.ToAhsv();
-			var remap = new PlayerColorRemap(info.RemapIndex, h, s);
+			var remap = new PlayerColorRemap(info.RemapIndex.Length == 0 ? Enumerable.Range(0, 256).ToArray() : info.RemapIndex, h, s);
 			wr.ReplacePalette(info.Name, new ImmutablePalette(wr.Palette(info.BasePalette).Palette, remap));
 		}
 	}
diff --git a/OpenRA.Mods.Common/Traits/Palettes/FixedColorPalette.cs b/OpenRA.Mods.Common/Traits/Palettes/FixedColorPalette.cs
index e856bcd214..a0b7bc879c 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/FixedColorPalette.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/FixedColorPalette.cs
@@ -10,6 +10,7 @@
 #endregion
 
 using System;
+using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
 using OpenRA.Traits;
@@ -53,7 +54,7 @@ namespace OpenRA.Mods.Common.Traits
 		{
 			var (_, h, s, _) = info.Color.ToAhsv();
 
-			var remap = new PlayerColorRemap(info.RemapIndex, h, s);
+			var remap = new PlayerColorRemap(info.RemapIndex.Length == 0 ? Enumerable.Range(0, 256).ToArray() : info.RemapIndex, h, s);
 			wr.AddPalette(info.Name, new ImmutablePalette(wr.Palette(info.Base).Palette, remap), info.AllowModifiers);
 		}
 	}
diff --git a/OpenRA.Mods.Common/Traits/Palettes/IndexedPlayerPalette.cs b/OpenRA.Mods.Common/Traits/Palettes/IndexedPlayerPalette.cs
index c5f4ba7a7e..8a2500ed62 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/IndexedPlayerPalette.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/IndexedPlayerPalette.cs
@@ -11,6 +11,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
 using OpenRA.Traits;
@@ -42,7 +43,7 @@ namespace OpenRA.Mods.Common.Traits
 		public void RulesetLoaded(Ruleset rules, ActorInfo ai)
 		{
 			foreach (var p in PlayerIndex)
-				if (p.Value.Length != RemapIndex.Length)
+				if (p.Value.Length != (RemapIndex.Length == 0 ? 256 : RemapIndex.Length))
 					throw new YamlException($"PlayerIndex for player `{p.Key}` length does not match RemapIndex!");
 		}
 	}
@@ -62,7 +63,7 @@ namespace OpenRA.Mods.Common.Traits
 			ImmutablePalette pal;
 
 			if (info.PlayerIndex.TryGetValue(playerName, out var remap))
-				pal = new ImmutablePalette(basePalette, new IndexedColorRemap(basePalette, info.RemapIndex, remap));
+				pal = new ImmutablePalette(basePalette, new IndexedColorRemap(basePalette, info.RemapIndex.Length == 0 ? Enumerable.Range(0, 256).ToArray() : info.RemapIndex, remap));
 			else
 				pal = new ImmutablePalette(basePalette);
 
diff --git a/OpenRA.Mods.Common/Traits/Palettes/PaletteFromFile.cs b/OpenRA.Mods.Common/Traits/Palettes/PaletteFromFile.cs
index dd5103ad1e..f309626cf5 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/PaletteFromFile.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/PaletteFromFile.cs
@@ -23,7 +23,7 @@ namespace OpenRA.Mods.Common.Traits
 	{
 		[PaletteDefinition]
 		[FieldLoader.Require]
-		[Desc("internal palette name")]
+		[Desc("Internal palette name")]
 		public readonly string Name = null;
 
 		[Desc("If defined, load the palette only for this tileset.")]
diff --git a/OpenRA.Mods.Common/Traits/Palettes/PaletteFromGrayscale.cs b/OpenRA.Mods.Common/Traits/Palettes/PaletteFromGrayscale.cs
index ce30b98fd9..0c617b7b36 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/PaletteFromGrayscale.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/PaletteFromGrayscale.cs
@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2021 The OpenRA Developers (see AUTHORS)
+ * Copyright 2007-2022 The OpenRA Developers (see AUTHORS)
  * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation, either version 3 of
@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
@@ -22,7 +23,7 @@ namespace OpenRA.Mods.Common.Traits
 	{
 		[PaletteDefinition]
 		[FieldLoader.Require]
-		[Desc("internal palette name")]
+		[Desc("Internal palette name")]
 		public readonly string Name = null;
 
 		[Desc("If defined, load the palette only for this tileset.")]
@@ -49,7 +50,7 @@ namespace OpenRA.Mods.Common.Traits
 		public void LoadPalettes(WorldRenderer wr)
 		{
 			// Enable palette only for a specific tileset
-			if (info.Tileset != null && !string.Equals(info.Tileset, world.Map.Tileset, System.StringComparison.InvariantCultureIgnoreCase))
+			if (info.Tileset != null && !string.Equals(info.Tileset, world.Map.Tileset, StringComparison.InvariantCultureIgnoreCase))
 				return;
 
 			wr.AddPalette(info.Name, new ImmutablePalette(Enumerable.Range(0, Palette.Size).Select(i => (i == info.TransparentIndex) ? 0 : (uint)Color.FromArgb(255, i, i, i).ToArgb())), info.AllowModifiers);
diff --git a/OpenRA.Mods.Common/Traits/Palettes/PaletteFromRGBA.cs b/OpenRA.Mods.Common/Traits/Palettes/PaletteFromRGBA.cs
index 56461defe8..a0aa5db518 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/PaletteFromRGBA.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/PaletteFromRGBA.cs
@@ -9,6 +9,7 @@
  */
 #endregion
 
+using System;
 using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
@@ -22,7 +23,7 @@ namespace OpenRA.Mods.Common.Traits
 	{
 		[PaletteDefinition]
 		[FieldLoader.Require]
-		[Desc("internal palette name")]
+		[Desc("Internal palette name")]
 		public readonly string Name = null;
 
 		[Desc("If defined, load the palette only for this tileset.")]
@@ -61,7 +62,7 @@ namespace OpenRA.Mods.Common.Traits
 		public void LoadPalettes(WorldRenderer wr)
 		{
 			// Enable palette only for a specific tileset
-			if (info.Tileset != null && !string.Equals(info.Tileset, world.Map.Tileset, System.StringComparison.InvariantCultureIgnoreCase))
+			if (info.Tileset != null && !string.Equals(info.Tileset, world.Map.Tileset, StringComparison.InvariantCultureIgnoreCase))
 				return;
 
 			var a = info.A / 255f;
diff --git a/OpenRA.Mods.Common/Traits/Palettes/PlayerColorPalette.cs b/OpenRA.Mods.Common/Traits/Palettes/PlayerColorPalette.cs
index 9aa0ec5610..9ec11b9b7d 100644
--- a/OpenRA.Mods.Common/Traits/Palettes/PlayerColorPalette.cs
+++ b/OpenRA.Mods.Common/Traits/Palettes/PlayerColorPalette.cs
@@ -10,6 +10,7 @@
 #endregion
 
 using System;
+using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Primitives;
 using OpenRA.Traits;
@@ -50,7 +51,7 @@ namespace OpenRA.Mods.Common.Traits
 		{
 			var (_, h, s, _) = color.ToAhsv();
 
-			var remap = new PlayerColorRemap(info.RemapIndex, h, s);
+			var remap = new PlayerColorRemap(info.RemapIndex.Length == 0 ? Enumerable.Range(0, 256).ToArray() : info.RemapIndex, h, s);
 			var pal = new ImmutablePalette(wr.Palette(info.BasePalette).Palette, remap);
 			wr.AddPalette(info.BaseName + playerName, pal, info.AllowModifiers, replaceExisting);
 		}