Bioengineered bacteria can make dyes more sustainable
Researchers gave bacteria the genetic tool they needed to make indigo naturally
Scientists harness a rare true blue color from nature — in red cabbage
Chemists gave this natural pigment an extra blue boost with aluminum ions
Researchers discover a new high-altitude Himalayan lake — and its waters are red
The reddish hue of the lake is likely due to iron-rich minerals in the area
Despite a mistaken mathematical proof, you do only need four colors to make a good map
Alfred Kempe's 1879 proof of the Four Color Theorem contained a mistake. Nearly a century, later his work was vindicated
A viper's zig-zag colors help blur their predators' vision
Scientists previously thought that animals' color patterns were either warning signs or camouflage — on these snakes, they are both
Male mosaic canaries are more colorful than their female counterparts thanks to one gene
Researchers found that carotenoid pigments in female canaries' feathers break down faster than in males
Buckeye butterflies get their color from their scales
Nanostructures combine with pigments to form all the colors in the rainbow
Tracking specific hair cells reveals how stress causes gray hair
The science of why stress changes hair color