Smoke from Canadian wildfires is again blanketing parts of the U.S. in a thick haze. Midwestern cities like Chicago, Minneapolis, Detroit and Milwaukee posted some of the worst air quality in the ...

This week, millions of Americans are anxiously scanning air quality maps focusing on two colors: red and purple. Red indicates "unhealthy" air quality, and purple? "Very unhealthy." When did purple ...

A biomedical optics engineer discovered a visual illusion where purple dots appear bluer in peripheral vision. This ...

Ahead of Pantone’s December 4 announcement of its 27th Color of the Year, explore the complete history of selections that have shaped design trends and reflected our collective mood. Pantone will ...

Many of us develop strong attachments to particular colors, but purple brings out the most focused and enthusiastic devotion. What makes purple so distinctive? Part of the answer comes from optics.