I'm not colorblind, but every week or so, over on the subreddit, there are front-page posts about this. Directional indicators can be hard/impossible to see as well as the indicators for player alignments apparently.

I'm sure there a number of other issues that I wouldn't know about, but since I haven't seen a topic in the feedback forums I thought I'd throw it out there.

Color-blind options should be standard like subtitles these days.