Allow changing faction colors

Source/Client/Factions/FactionCreator.cs

@@ -30,6 +30,15 @@ public static void SendPawn(int playerId, Pawn p)
         pawnStore.GetOrAddNew(playerId).Add(p);
     }
 
+    [SyncMethod]
+    public static void ChangeFactionColor(Faction faction, Color color)
+    {
+        if (faction is not { IsPlayer: true })
+            return;
+
+        faction.color = color;
+    }
+
     [SyncMethod]
     public static void CreateFaction(int playerId, FactionCreationData creationData)
     {
@@ -286,4 +295,3 @@ public record FactionCreationData : ISyncSimple
     public List<ThingDefCount> startingPossessions;
     public bool setupNextMapFromTickZero;
 }
-

Source/Client/Factions/FactionsWindow.cs

@@ -51,6 +51,21 @@ void DrawFactionInLastRect(Faction faction)
 
                 using (MpStyle.Set(GameFont.Medium))
                     Layouter.Label(faction.Name);
+
+                var colorRect = Layouter.Rect(20f, 20f);
+                Widgets.DrawBoxSolid(colorRect.ContractedBy(2f), faction.Color);
+                Widgets.DrawBox(colorRect);
+                Widgets.DrawHighlightIfMouseover(colorRect);
+
+                if (Widgets.ButtonInvisible(colorRect))
+                {
+                    Find.WindowStack.Add(new Dialog_ChooseFactionColor(color =>
+                    {
+                        FactionCreator.ChangeFactionColor(faction, color);
+                    }, faction.Color));
+                }
+
+                TooltipHandler.TipRegion(colorRect, "MpChangeFactionColor".Translate());
             }
             Layouter.EndHorizontal();