The rhyme scheme of Sonnet 130 follows the traditional Shakespearean sonnet rhyme scheme of abab/cdcd/efef/gg. In other words, throughout the poem, the rhyme scheme alternates every other line until the end of the poem, which concludes with a rhyming couplet intended to draw attention to the poem's overall theme.
The rhyming scheme in the first quatrain of sonnet 130 is ABAB. In the second quatrain is CDCD. In the third quatrain it is EFEF. And in the final couplet the rhyming scheme is GG.