Make the default player color configurable in mod.yaml

OpenRA.Game/DefaultPlayer.cs

@@ -0,0 +1,20 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2020 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
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Primitives;
+
+namespace OpenRA
+{
+	public class DefaultPlayer : IGlobalModData
+	{
+		public readonly Color Color = Color.FromAhsl(0, 0, 238);
+	}
+}

OpenRA.Game/Map/PlayerReference.cs

@@ -30,7 +30,7 @@ namespace OpenRA
 		public string Faction;
 
 		public bool LockColor = false;
-		public Color Color = Color.FromAhsl(0, 0, 238);
+		public Color Color = Game.ModData.Manifest.Get<DefaultPlayer>().Color;
 
 		public bool LockSpawn = false;
 		public int Spawn = 0;