Accessibility in Dungeons: Enemys behind walls

As someone who is colorblind i really like that the accessibility options allow me to change the outline but i would also like to change the color of enemys behind walls or trees, i can't tell you how many times i was brought to the edge of game over because i didn't see a creeper standing behind a wall. An easy fix for that would be that we could customize what colors enemys siluetts have when they are behind walls. I would recon that would not be to tricky to do programming wise either considering we can already change the outlines.