You have to save Yuri first, then you have to get either get possessed by the red ghost or by Jessica herself in the mirror when it breaks then grab the lantern and star crystal from Jessica's room next go through the top door on the right in the east corridor. Then go through that area till you reach the end and have all the items it says to make the paints the dust star crystal and a slug or an egg crystal and dust, then you can make the paint you don't find the paints at least not in the manor you have to make them.