Children ask why the sky is blue, and there usually isn’t anybody around to provide a satisfying answer. The sky is blue because… the atmosphere? And gases. The sky is blue because of the air and the Sun. The sky is blue because the sky is blue, and it’s time to go to school. Maybe they’ll tell you there.
Well, this reminds me of a 2008 article “What color is the internet?” and my thoughts on the color issue: “[…] the internet is mostly blue. In particular, blogs are red, games are green and design website are grey. I must admit they are calling it dominant colors for the categories, the average color seems pretty grey.” It would be interesting to check wether anything has changed. I bet the internet became even more dominantly blue over the past few years.