
color wheel
- A radial diagram
of colors in which primary
and secondary, and sometimes
intermediate colors are
displayed as an aid to color identification, choosing, and mixing.
A color wheel with primary (red, yellow, blue) and secondary (orange,
green, violet) colors can be seen to the left below. The complement
to each color is the color opposite that color on the color wheel.
To the right below are diagrams of complementary colors, demonstrating
the ratios devised by Johannes Itten, in response to these colors'
relative intensities and
values.
Other examples:
This commercially available color wheel is based on the primaries of red, blue, and yellow -- CMYK primaries (cyan, magenta, and yellow, along with black) -- used when mixing pigments. How do you mix Kelly Green? What do you get from yellow and purple? How can I mix a certain brown? A color wheel is a very handy reference for answering such questions.
This commercially available color wheel is based on the CMYK primaries -- cyan, magenta, and yellow (along with black). It also references subtractive color mixing -- using the RGB (red green blue) primary colors used when mixing light. Dye is transparent and therefore mixes much like light. This color wheel is more useful for mixing dyes than opaque paints.

Also see color, hue, palette, saturation, shade, tint, tone.
