Persol PO2471S - Chris Evans - The Gray Man
The sunglasses have a metal and transparent 'honey' (yellow) frame.
The Persol 2471 sunglasses are available in several color combinations on Amazon.com and on eBay.
Interestingly enough, Billy Bob Thornton wears the same model Persol sunglasses but with a tortoise frame.
Reference: Persol PO2471S 109356 50-21 Honey