Blue is a cool color by nature, and it works well with pretty much any other cool tone: gray, purple, even black. Using color combinations like these will give your room a sense of stability and calm. For higher contrast—and a bolder look—use a warm accent color, like red or yellow.
What type of color scheme has the highest contrast?
Complementary. Colors that are opposite each other on the color wheel are considered to be complementary colors (example: red and green). The high contrast of complementary colors creates a vibrant look especially when used at full saturation. This color scheme must be managed well so it is not jarring.