I have an idea for a slight modification to the board and it's possible games that would help support colorblind players. A shape could be assigned to each color, so, for example, all blue buttons would have a square on them, and all yellow buttons would have a triangle on them. Then, a game could say something like, "Quick, press a blue (🔲) button!" instead of simply, "Quick, press a blue button!".

From a practical standpoint, I'm not sure how to add shapes to each color on the board itself (since stickers or paint would wear down pretty quickly over repeated use). This is a prototype board though, so it is something I would like to keep in mind for the future.