Place painted foam board in the back of the bookcase, giving the look of a painted bookshelf w/out the commitment. Love this idea for a small book shelf next to couch. Good way to use yellow without committing to it in a big space.
There's nothing more visually effective than a beautifully coloured house. Whether it's through accessories in the kitchen, or by introducing bright fabrics into the furniture. Make an effort to involve colour in your home for a vibrant living space.