@Jörgen, What Hans means is that specific colors have specific meanings. There is a schema for those colors and Hans wants to stick to that, which I can understand. No one wants to review all routes because of such a futile change. Despite my partial color blindness I have no problems whatsoever with recognizing pink from red. Difference between yellow and green however is more of a problem for me. I would not ask for a change because of it though.
EDIT:
for convenience:
@Hans-van-de-Ven-MRA-Master, Maybe it is a good idea to place this info in this link:
because I could not find it anywhere.