I don't think that the FAA are going to implement a new colour test that will discriminate people even if it has been rubber stamped by City Uni in London.
I do believe that a legal challenge is the best way to blow away these archaic practices and tests. The best form of defense is attack and I just can't help thinking that an organisation sponsor such as AOPA or a Human Rights organisation could bring a class action against CAA. There is a greater chance of positive change if a very large group of pilots took a group legal action.
Is there a CVD pilot / barrister out there who would like to advise and organise ???