diff --git a/src/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs b/src/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs
index 43b1dd2dde..fc349d4032 100644
--- a/src/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs
+++ b/src/BizHawk.Client.EmuHawk/tools/Lua/LuaPictureBox.cs
@@ -283,7 +283,7 @@ namespace BizHawk.Client.EmuHawk
 
 		public void DrawRectangle(int x, int y, int width, int height, [LuaColorParam] object line = null, [LuaColorParam] object background = null)
 		{
-			var bg = TableHelper.SafeParseColor(line) ?? _defaultBackground;
+			var bg = TableHelper.SafeParseColor(background) ?? _defaultBackground;
 			var boxBackground = Graphics.FromImage(Image);
 			if (bg.HasValue)
 			{
@@ -291,7 +291,7 @@ namespace BizHawk.Client.EmuHawk
 				boxBackground = Graphics.FromImage(Image);
 			}
 			
-			boxBackground.DrawRectangle(GetPen(TableHelper.SafeParseColor(background) ?? _defaultForeground), x, y, width, height);
+			boxBackground.DrawRectangle(GetPen(TableHelper.SafeParseColor(line) ?? _defaultForeground), x, y, width, height);
 		}
 
 		public void DrawText(