A different palette = changing the colour of it, and by doing that, it could ruin tehe trees, and I cannot put it as a different pallettes for 2 reasons.
1. Ruins that pallette which could have important things.
2. Can't use anything over Pallette... 5 or 6, as they are Pallettes specific to the Secondary Tileset. Because Agates tiles are in the Primary Tileset, they will (most chances) be glitchy colours in game if we do this.