Most rooms design use one of the 
three basic color schemes:
Single color - uses one color in varying shades. This color scheme is easy to develop and creates a restful feeling in a room.
Related color - uses colors that are next to each other on the color wheel, for example, green and blue. This color scheme creates a quiet effect; light related colors are relaxing while dark related colors are elegant and formal.
Complementary color - a mix of two or three colors located across the color wheel from each other, like blue and yellow. The most dramatic effects can be achieved using this color scheme.
Content Provided by the Wallcoverings Association (WA).
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