Weird warbler reveals genetics of its mismatched colors

An incredibly rare hybrid warbler with mismatched color patterns has allowed researchers to disentangle the genetic drivers of two traits that usually come as a package deal—the black face mask and the black throat patch ...

Age-related stem cell dysfunction linked to eye-color gene

In a discovery with implications for colorectal cancer in humans, RIKEN geneticists have found that a gene that determines eye color in fruit flies also plays a role in the tendency of gut stem cells to proliferate out of ...

Researchers question the cooperative eye hypothesis

The sclera of the eye is devoid of pigment, which is why humans can easily follow where counterparts are looking. Researchers have long believed this facilitates glance-based communication. A team of zoologists based at the ...

Florida bans 'critical race theory' from its classrooms

Florida's state Board of Education banned "critical race theory" from public school classrooms Thursday, adopting new rules it said would shield schoolchildren from curricula that could "distort historical events."

The patchy environment of a rare cosmic explosion revealed

Scientists from the National Centre for radio Astrophysics of the Tata Institute of Fundamental Research (NCRA-TIFR) Pune used the upgraded Giant Metrewave Radio Telescope (uGMRT) to determine that AT 2018 cow, the first ...

Temperature sensor could help safeguard mRNA vaccines

Scientists have developed vaccines for COVID-19 with record speed. The first two vaccines widely distributed in the U.S. are mRNA-based and require ultracold storage (-70 C for one and -20 C for the other). Now, researchers ...

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Color or colour (see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, green, blue and others. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates.

Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.

The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).

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