It's a question, so I'm guessing: Ni har röd färg. (You (pl.) have red paint), when you switch the subject and the verb, becomes Har ni röd färg? (Have you [got] red paint?/Do you have red paint?) But I'm puzzled by this because I think I saw a lesson called "questions" later on in the tree, so I'm not sure whether this type of sentence is prematurely here?