(something) is you

(something) is you

Something compliments or suits one well. Oh wow, that dress is you! That shade of green looks great against your skin. Oh, that painting is you—you have to get it.

it's you

Said when something compliments or suits one well. Oh wow, that dress, it's you! That shade of green looks great against your skin. A: "What do you think of this painting?" B: "Oh, it's you, for sure. It would look great with the rest of your décor."
Farlex Dictionary of Idioms.
See also:
  • it's you
  • It's you!
  • return (something) for (something)
  • return for
  • (one) is not as green as (one) is cabbage-looking
  • be tailor-made
  • be made for (someone or something)
  • turn the tables on (one)
  • puff piece
  • bear a resemblance to (someone or something)