It has been known for some time that colors can be described by three numbers. If I show you light of a certain color and ask you to match it by combining lights of three other colors and varying their intensities, you'll typically be able to find a combination that looks indistinguishable. But the wavelengths you combine might be very different from the wavelengths I showed you. Light of the wavelength corresponding to yellow and light of the right combination of red and green wavelengths will look the same, even though they are physically quite different.[more inside]
THE PROBLEM OF THE AMBER SIGNAL LIGHT IN TRAFFIC FLOW (PDF), published in 1959, is the origin of the yellow interval duration equation for traffic lights. But in China, as of Tuesday, yellow lights are now considered functionally the same as red lights, prompting outcries in the local media that it is not only unfair, but actually violates Newton's First Law of Motion. It also violates the history of traffic lights... [more inside]
Smarties Australia paired 8 kids up with 8 artists to create art based on each Smarties colour. Here's orange video art, a song about moonwalking under the deep blue sea, the spoken word saga of a disco karaoke'ing duck, an upside-down red pop art world, The Pink Moon, photos of the purple Filecian dancers, a green tree sculpture, and the dance of insects burrowing through brown earth.
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]
Million to one apple is half red, half green. "Fruit grower Ken Morrish was left stunned when he found a golden delicious apple on his tree split exactly half green, half red down the middle." [more inside]
"What is the sound of color? We asked that question of 5 musicians. We assigned each musician a different color. They wrote 5 tracks. We gave the colors and tracks that inspired them to 5 directors." The Sound of Color contains the songs and videos that were created. The site and free downloads are only available through March 15. (Via Carolina Vigna-Marú) [more inside]