Hi there, I hope it is alright to post this here instead of the suggestions megathread, since this is a proof of concept and not a full set of textures; but I have an idea for a colorblind mode for gamemodes with 4 teams I'd like to share.
Right now, this is what a person with the most common type of color blindness, Deuteranopia, would see. The red, green, and yellow teams all look almost identical to each other. This problem could be solved by adding an optional pattern to the uniform of these teams.
This is a quick mock-up I made to show off the idea, a colorblind person would see this:
Now with the pattern applied, the different teams are much easier to single out.