The article seems to get some of it's key foundation points a bit wrong. :(
eg:
> If you think about it, blue doesn’t appear much in nature — there aren’t blue animals, ...
Unless they're being very precise with their definition of "animals", which the article doesn't sound like it is being, they're off base. Blue creatures do exist:
* https://en.wikipedia.org/wiki/Bluebird
* http://www.flmnh.ufl.edu/exhibits/always-on-display/butterfl...
(etc)