One paint store told me they have this machine you can borrow & place it over the existing paint & it will give the EXACT paint color needed. Might have to sand doen to make the chipped area smoother & the paint easier to adhear to....but it is doable.

Hmmmm this may in deed be a mental health post as we have no idea WHY the kid slammed the door in the first place & fixing a problem is good for Distress tolerance & it takes the wise mind to figure out the best way to solve the problem & knowing to ask for help on something one doesnt kow how to do is great for Interpersonal effectiveness.