Colorblind mode

[caseif]

We currently use red and green to visually distinguish obfuscated and deobfuscated items. I propose we implement a way to change the color scheme to ensure accessibility for colorblind developers who might have a more difficult time distinguishing them. This doesn't need to be full-fledged color customization - a few presets would probably do just fine.

This is contingent on #40 being implemented.