personally, I find that the color blindness or low vision can be a barrier for the person with dementia. By the will, we can all do, any work.
Keep in mind that it has the ability to realize our dreams and to be independent.
The pathology was never a handicap. when we want to, we can.
I am achromate but despite everything, today, I am optician and photographer with a local magazine is very prestigious to the point of being named the photographer who does not see colors, weird but true.