Irritatingly can't find this in Guardian online but bless Ben Goldacre, he uncovers the truth behind that stupid study claiming evolutionary reasons behind blue is for boys this week. And points out that before the 1940s, it was the other way round - baby boys were dressed in pink, seen as more masculine as a diluted version of red.
He points out the study measured preference, not discriminatory ability - so it didn't show women are any better at finding red berries as the authors claimed. And lots of other goods stuff, too.