Editing Complementary colors (section)

===Traditional color model===
The traditional [[color wheel]] model dates to the 18th century and is still used by many [[artist]]s today. This model designates red, yellow and blue as primary colors with the primary–secondary complementary pairs of red–green, blue-orange, and yellow–purple.<ref>{{cite book|last=Maloney|first=Tim|title=Get Animated!: Creating Professional Cartoon Animation On Your Home Computer|year=2009|publisher=Random House Digital|isbn=9780823099214|page=PT32|url=https://books.google.com/books?id=fthWZUOAOVEC&pg=PT32}}</ref>

In this traditional scheme, a complementary color pair contains one primary color (yellow, blue or red) and a secondary color (green, purple or orange). The complement of any primary color can be made by combining the two other primary colors. For example, to achieve the complement of yellow (a primary color) one could combine red and blue. The result would be purple, which appears directly across from yellow on the color wheel.<ref>{{cite book|last=Hammond|first=Lee|title=Acrylic Painting With Lee Hammond|year=2006|publisher=North Light Books|isbn=9781600615801|url=https://archive.org/details/acrylicpaintingw00hamm_0|url-access=registration|page=[https://archive.org/details/acrylicpaintingw00hamm_0/page/17 17]|quote=paint violet mix red blue.}}</ref> Continuing with the color wheel model, one could then combine yellow and purple, which essentially means that all three primary colors would be present at once. Since paints work by absorbing light, having all three primaries together produces a black or gray color (see [[subtractive color]]). In more recent painting manuals, the more precise subtractive primary colors are magenta, cyan and yellow.<ref>for example, see Isabelle Roelofs and Fabien Petillion, La Couleur expliquée aux artistes, p. 16</ref>

Complementary colors can create some striking optical effects. The shadow of an object appears to contain some of the complementary color of the object. For example, the shadow of a red apple will appear to contain a little blue-green. This effect is often copied by painters who want to create more luminous and realistic shadows. If one stares at a color for about 45 seconds, and then looks at a white paper or wall, they will briefly see an [[afterimage]] of the object in its complementary color.

Placed side-by-side as tiny dots, in partitive color mixing, complementary colors appear gray.<ref name="briggs">{{cite web|url=http://www.huevaluechroma.com/044.php|title=The Dimensions of Color|author=David Briggs|year=2007|access-date=2011-11-23|archive-date=March 31, 2013|archive-url=https://web.archive.org/web/20130331062154/http://www.huevaluechroma.com/044.php|url-status=live}}</ref>