What colors are best for color blind?
Use a colorblind-friendly palette when appropriate
For example, blue/orange is a common colorblind-friendly palette. Blue/red or blue/brown would also work. For the most common conditions of CVD, all of these work well, since blue would generally look blue to someone with CVD.
Is pink colorblind friendly?
Meanwhile, common colorblind friendly palettes like magenta/green or orange/purple are devoid of meaning. Pink, for example, doesn't convey negativity like red does. Others, like blue/red, are already imbued with too much cultural meaning and would be confusing in a non-political map.