> Is this a conspiracy theory? It sounds a lot like a conspiracy theory to me. Just sayin'.

On the contrary, it was probably a mixture of ignorance and 'common knowledge.' I'm going to assume that if you're posting on this site that you probably are involved with making websites or software. Were you aware that a portion of your customers are colorblind in some way? Did you actively design your site to be hard for them to use? Probably not. Does that mean it is a non-issue? No. Much in the same way, white male test-makers make IQ tests that they think "anyone should know," without realizing that capable people with different backgrounds would not score very well at all.