Russell Crowe wears black Ray-Ban 3025 Aviator sunglasses in the movie The Next Three Days. His character wears the dark shades to stay incognito. Looks like the exact color of the Ray-Ban sunglasses that Crowe is wearing is Black frame and Gray (non-polarized) lenses, color-code 002.

The Ray-Ban RB3025 Aviator is available in several sizes and color combinations. 

Get the classic Ray-Ban RB3025 Aviator with black frame at the official Ray-Ban website, on Amazon.com or take a look on eBay.

Reference: Ray-Ban RB 3025 - Color: Black frame, Gray Green lenses (code 002)