Dual colored shulkers

Minecraft should make it so that you can have a dye for the top and bottom of the shulker. Maybe in a work bench you have the shulker in the middle, the top color dye above, and the bottom color bellow. I find that when you get supper far into the game and start building mega bases it can be hard to differ the shulkers even with the respectable amount of dyes already in the game.