http://3.bp.blogspot.com/_nlB2iavXqvs/SSgxTitmISI/AAAAAAAAC-s/ADwtAvkFT0...
This is an example of a color convention that doesn't make any sense to us...it is unrecognizable and confusing to interpret because of the distortion of how we usually see that color. This image seems to exist merely to test our reliability upon these conventions, because there is no other type of function this image could serve.