In New Super Mario Bros Wii/U, whenever Blue/Yellow Toad gets a Fire Flower, their caps change to the respective character's primary color and the spots turn red. For SNES Toad, I think this change ought to be implemented. Simply put, the red and white on his cap would switch places. For NES Toad, I believe the colors used are perfect for the Fire Flower, but I think the colors should be reversed on the cap to make it red as well. If there's a chance of Blue Toad ever making it as an alternate skin, I suggest his NES version would have the blue reversed on his cap in all forms, since technically he looks exactly alike NES Toad.