[ Argenti is thinking for red, like a warm sunset, or something like that. Alternatively, yes, his hair but he has nowhere near the skill to be doing anything other than definitely abstract and nowhere near portraits. ]

Complement?

[ He would have also had no idea she was keeping from the spotlight if she had not used the word 'complement', which is also well and good, but he is dipping his paintbrush in a thing of red already. Excitedly, he proclaims: ]

...Rather, I'm certain that with your dark, gothic preferences, you shall also be able to bring out an amazing work of art with both of our efforts doing well with colors borne from light and dark!