HERC2 has no effect on eye color, but it contains an unexpressed segment of DNA that is needed for the switching on of a nearby gene called OCA2, as demonstrated by newly published work by Robert-Jan Palstra and others at Erasmus University in the Netherlands.

WSJ: Matt Ridley on Human Culture's Effect on Genes | Mind & Matter

The biological basis for this complementary color effect is not well understood, nor is the depth of shadow, which is also an illusion.

CNN: What the brain draws from: Art and neuroscience

Bach said that 25 layers of lacquer were used as well 25 colors to get the proper effect and color.

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On his feet he wore a pair of red moccasins, and his socks (imagine wearing socks on the island) seemed to be the same color as his trousers, but, again, that might have been the effect of the moonlight on the water.

NEWYORKER: While the Women Are Sleeping

While it's already being used in art galleries and inside cameras (as sensor covers), Nippon Electric Glass is pushing hard to get its invisible glass featured on mobile devices -- the selling point here is simply to achieve the effect of somewhere in between glossy glass and matte glass, so that you'd get the best color vibrancy with minimal reflection.

ENGADGET: Nippon Electric Glass demos liquid crystal lens and 'invisible glass' at CEATEC (video)

The full list of seven Picture Effect options includes HDR Painting, Rich-tone Monochrome, Miniature, Toy Camera, Partial Color, Pop Color and Soft High-key.

ENGADGET: Sony Cyber-shot TX55 packs 16.2-megapixel sensor, promises 'extremely low' noise in dim light