Those people are able to distinguish suggested colors - the example is using primary colors. And at worst, it would be the same as all parenthesis being the same color (black).
no, its not. first of all either I sense brightness differently, or I use it to compensate. so highlighting of any kind make the text a mix of brightnesses from dingy to glaring across the text.
since it take me effort to actually parse the colors, this is a constant distraction.
so I can read monochrome text just fine, but multi-colored text really slows me down.
