u/Creepy-Basis-2174

Hello everyone, I'm an English education student, and I need help huhu.
My prof. structure of english gives us an assignment about syntactic structure, and the sentence is "She painted the house white", and she wants us to identify if "white" should be considered as an adjective phrase, but I'm pretty sure that "white" cannot be considered as an adjective phrase because an adjective phrase is about a group of words acting as an adjective, and "white" itself is only an adjective. I know she's just trying to test us, but please enlighten me huhuhu I need help.