I made this request and received positive response a few years back, but it apparently got lost somewhere in the shuffle. I was reminded of the topic at my local group’s most recent meeting.
I have now met two color-blind genealogists who use RMG, but can only marginally use its color coding feature. Both have the same suggestion.
The one with the most severe red-green deficiency cannot distinguish red and green, and most of the greenish colors are just gray-ish (as I am led to believe). They can use color coding, but on a very limited basis.
A solution for them? Patterns. We have 27 colors, and I would hope we could add another 8 or more. We could have cross-hatches diagonal and vertical/horizontal, wide bars vertical, horizontal, and diagonal right and left; fine lines, same variations. The list should be larger than this, but this is a first shot (well, second, but that was some time back.
Could this become reality?