How language affects our perception of colour...(SYTL) more on the 'linguistic relativity hypothesis' here and here
posted by Rufus T. Firefly on Aug 30, 2011 - 52 comments

Do you see what I see? Do people always see the same thing when they look at colours?
posted by crossoverman on Aug 12, 2011 - 68 comments

The average human eye has three types of cone cells, each of which is sensitive to a different wavelength range of visible light. The difference in the relative signal from the three cones allows us to distinguish colors. Unfortunately, since these sensitivity ranges overlap, there are some combinations of signals from the cones that can't be created by light emitted from a real object. These are the so-called "imaginary colors". However, by selectively overstimulating one or more types of cone, we can still perceive these colors; this is the principle behind the Eclipse of Titan, an optical illusion which produces both a green and a cyan that don't otherwise appear in nature. (Similar effects can be seen in the Eclipses of Mars, Neptune, and Triton.) [more inside]
posted by Upton O'Good on May 10, 2010 - 64 comments

A color-changing card trick. (Related to this old favorite.)
posted by Upton O'Good on Apr 22, 2010 - 25 comments

Color Is Relative, pretty and interesting eye candy created by Gabriel Mott, is a website dedicated to showing luminosity achieved through simple color combinations. On the site, the image is interactive. By moving the mouse over a single swatch the background color of the page will change to the same color. [more inside]
posted by nickyskye on Aug 29, 2008 - 13 comments