What color are autism awareness ribbons?

The autism awareness ribbon is multicolored, with a puzzle pattern in different shades of red, blue and yellow, according to The Autism Society. The puzzle pattern is meant to reflect the complexity of the condition and represent the diversity of people and families affected by autism and related disorders.

The Autism Society adopted the puzzle ribbon as its trademark in 1999, and it quickly became a universal symbol for autism awareness. The Autism Society grants the use of the puzzle ribbon to other nonprofit organizations to help raise awareness and encourage unity among supporters. The puzzle ribbon is available for purchase on apparel, magnets and other merchandise, notes the Autism Society.