Red means stop; green means go. You live in a red or a blue state. You feel green with envy, or you're tickled pink. Colors alert, provoke, attract, divide and unite us. Thinkers from Plato to ...

Pink—which may go back over a billion years—was once the color of fierce ancient hunters, powerful French women, and yes, boys. Pink has long beguiled humans—used to dye clothing and tint cheeks even ...