What color do Catholic Cardinals wear?
The defining costume color of a Roman Catholic Cardinal is scarlet red. The daily wear of a Cardinal is a cassock, a long button-front robe that is ordinarily black, except in the tropics where it may be white. The Cardinal's cassock is trimmed with red and worn with a broad red sash around the waist. More formal wear is the Choir Vestment or Choir Dress outfit, featuring a scarlet red cassock, over which is worn a white lace-trimmed robe called a rochet, along with a scarlet red cape called a mozzeta, and a scarlet red hat (biretta) or cap.