A great example because color blindness has hidden advantages - colorblind folks tend to be slightly better at detecting non-color differences (e.g. brightness, texture).
Most things in evolution (or in any context) are a tradeoff, and that's what makes group selection such a powerful framework. Easy to see how it might be advantageous to have a population with a mix of color-acuity experts and brightness-acuity experts.
Though, as with all post hoc evolutionary hypotheses, treat this as a thought experiment, salt grain included :)
To generalize this thought one step further: if you want some kind of practical case for the advantages of diversity & inclusion, that was it! The broader variety your group contains, better odds you'll have the right person for the (any) situation.
