Look at this boring closet PAX from Ikea.
I strongly felt it needed some color, especially to fit in a specific livingroom (white and black)! Said and done!
With paint and wallpaper the whole closet turned into a decorated wall.
I started by making sure the original finish got off and cleaned the doors and sides. After that I just painted the frames in a black lac-dye and the sides white (to make the closet ‘melt’ into the white wall) and let it all dry. Afterwards I put up the wallpaper on the slide doors and Voilá!