I think it's the human tendency to notice intense color more than ordinary colors. Who wants to live on Brown Horse Road?

It explains why red hair and golden hair get more mentions than dishwater blonde (aside from Jeannie with the Light Brown Hair) and why blue eyes and black eyes get more mentions than gray eyes.


Moving on to art, we note that Picasso's Blue Period is famous, but that nobody's sepia period ever gets a mention. And so it goes.