Rummikub for blind and colourblind

Maybe you all know the famous and popular board game Rummikub invented by Mr. Ephraim Hertzano. If not, it's an almost addictive game with number tiles where you have to make pairs of numbers. It is really fun and always exciting. I play this game all the time with my neighbor and her husband (Ann and Tom), which are not their real names. Tom unfortunately has Parkinson's, diabetes and is color blind (become). But he always tries to help Ann, but can not distinguish the different colors. I