Everyone knows that red means danger, but how did purple become a cautionary color? At an EPA conference in the late 1990s, attendees nearly came to blows over color coding on the Air Quality Index.

Purple is even worse. NPR's Neda Ulaby tells us how purple came to be a scarier color than red. NEDA ULABY, BYLINE: Red is the traditional color of danger, of stop signs, of warnings.

The group brings women together to enjoy social events in red and purple attire. “As we get older, society kind of pitches (older women) as, ‘you're done,’” Granich says.