Colour Wheel

Colour Wheel and Complimentary Colours

• "red and green
• blue and orange
• yellow and violet

The complement of each primary color (red, blue, or yellow) is roughly the color made by mixing the other two in a subtractive system:

• red complements (blue + yellow) = green
• blue complements (red + yellow) = orange
• yellow complements (red + blue) = violet

When two complements of opaque paint are mixed, they approximate black. For example, a little bit ofultramarine mixed with orange, produces a dark variation of black. Placed side by side as tiny dots, in partitive color mixing, they produce gray. As colored light projected on a white screen, in additive color mixing, they produce white.

The use of complementary colors is an important aspect of aesthetically pleasing art and graphic design. This also extends to other fields such as contrasting colors in logos and retail display. When placed next to each other, complements make each other appear brighter. On an artistic color wheel, complementary colors are placed opposite one another. "

- description source wikipedia