“How did we get the blue regime that [Paul] Hebert’s actually quantified, and many others have observed? It’s not like there’s some centralized Web design authority dictating these things. Anecdotally, Mark Zuckerberg has said Facebook is blue because he’s red-green colorblind, and Google has said the color clicked best in rigorous A/B tests. But the underlying reason may be that design, like art, imitates life.”