Mark Ruffalo wears a pair of black Ray-Ban 2132 New Wayfarer sunglasses in the film Begin Again.

The glasses he wears have a black frame.

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Note that the polarized version of Ray-Ban glasses are more expensive than the non-polarized version.

Begin Again is a 2013 American musical comedy-drama film written and directed by John Carney, starring Keira Knightley, Mark Ruffalo, and Adam Levine. Knightley plays a singer-songwriter who is discovered by a struggling record label executive (Ruffalo) and collaborates with him to produce an album recorded in public locations all over New York City.

Reference: Ray-Ban RB2132 New Wayfarer Black frame / Crystal Green lenses (901/58)