Actor Bradley Cooper seems to be wearing Ray-Ban 3025 (also known as the Ray-Ban Aviator) sunglasses in the 2009 comedy The Hangover.

The exact color of Bradley Cooper's Ray-Ban sunglasses seems to be silver frame, with pink or red lenses. The Ray-Ban logo is not visible on the lenses anymore, so the lenses could be custom fitted. The color of the lenses doesn't look like any of the standard Ray-Ban colors, which also suggests a custom lens. A Ray-Ban 3025 Aviator with gold frame and pink lenses is available here.

Reference: Ray-Ban RB 3025 - Color: Silver frame, custom pink/red lenses