diff --git a/Program.cs b/Program.cs
index c8a2886..fd63468 100644
--- a/Program.cs
+++ b/Program.cs
@@ -311,7 +311,8 @@ public class Game : GameWindow {
       Box2i box = makeBox(windowWidth - thumbnailWidth, i * thumbnailHeight, thumbnailWidth, thumbnailHeight);
       DrawTexture(textures[i], box);
       if (i == textureIndex) {
-        DrawBox(box, 3, Color4.GreenYellow);
+        DrawBox(box, 5, Color4.Black);
+        DrawBox(box, 3, Color4.White);
       }
     }