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A pulsating mass of cerulean edged in white is at the core of this compact, not-quite-square painting, at 30 by 36 inches just six inches wider than it is high.

“San Francisco has never abandoned its values of compassion and second chances,” said Breed, wearing one of her signature suits, this one a bold cerulean blue.

After all, it wasn’t easy: it took a 3,000-mile, 13-year detour to get on the right path — all thanks to a cerulean doughnut truck covered in sprinkles.

DB, a slacker pool cleaner with eyes the same cerulean shade as the chlorinated body of water he tends to with an almost religious ecstasy.

Whether ultramarine, cerulean, Egyptian or cobalt, blue pigments have colored artworks for centuries.