The background color is inspired by International Klein Blue, a hue that the artist Yves Klein first mixed in the 1950s, using it to make an array of monochromatic paintings until his death in 1962.

These are the 11 best dark blue paint colors that interior designers use time and time again in their projects.

This story appears in the January 2017 issue of National Geographic magazine ... began the “Pink and Blue Project,” an ongoing photographic series of the two colors that are most frequently ...