✦Blue is the world's most universally liked color — studies across cultures consistently find it ranked first, which makes it uniquely lonely: loved by everyone, belonging to no one.
✦There was no word for blue in many ancient languages, including Ancient Greek, Japanese, and Hebrew — it was the last primary color humans learned to name.
✦Blue light has the shortest wavelength of visible colors, which means it scatters the most — it's literally the color that spreads itself thinnest trying to fill the whole sky.
✦In color psychology, blue is tied to both trust and sadness — it's the color of what you thought was solid slowly showing its cracks.
✦"Feeling blue" as an expression of melancholy dates to the 14th century — sailors would fly blue flags when a captain died at sea, mourning displayed in color.
✦The film Blue Valentine was shot in two different formats — warm Super 16mm for the past, cold digital for the present — because the color of love changes depending on when you're looking at it.