Answer:
Predicative of the object
Explanation:
The predicative is the part of a sentence that attributes characteristics to the subject or object of the sentence, that is, it is what is said about the subject or object.
In this case, there are two types of predicative, the predicative of the subject and the predicative of the object.
The subject's predicative is one that promotes characteristics to the subject and through a connecting verb that can be transitive or intrasitive. However, the predicative of the object is that which characterizes the object through a transitive verb, which is one that has an incomplete meaning and needs a complement.
In the case of the phrase "I will paint the wall in my bedroom deep purple" we can recognize the predicative as a predicative of the object, since the verbs "will paint" are transitive verbs, which promote characteristic to the "wall" object that will be painted deep purple.