The colors blue and red combine to make purple. The color purple is often used interchangeably with violet, although violet is closer to blue on the color wheel.
Purple is one of three secondary colors created by the primary colors, which include blue, red and yellow. Other secondary colors are green and orange.
Yellow is the color that is complimentary to purple since it is directly across from purple on the color wheel. Yellow enhances the color purple when it is side by side, but it dulls or neutralizes purple if combined together.
Purple is considered a cool color that inspires images of the sky and water. Cool colors like purple, blue and green are visually calming and soothing and make small rooms appear larger.