Why would you want to do this? Is this for a child's bedroom? Even though it sounds like a lively idea, I think it would be disturbing and it would distract from any sort of decor that you're hoping to add to the room to finish it. If you want to do a multi-colour scheme, why not do a striped effect on one wall. Horizontal stripes would be more soothing than vertical ones. I always suggest that people purchase their bedding before they choose wall colours. Look for bedding that incorporates a number of colours which will inspire the paint treatment.

For a sound sleep , I find that there should be no TV in the bedroom. Shades that block out any unwanted light help. A quite environment and comfortable temperature. For me, blue is the most serene, therefore restful color. A matte finish rather than one that is glossy is better. Some good bues are: and

first one is look better

Ok so go for ambient and cool colour wallpaper behind the wall. You can have same colour in ceiling that of wardrobe and make other wall plain light colour.