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There are two types of short wave color vision in birds: violet sensitive (VS) and ultraviolet sensitive (UVS). [36] Single nucleotide substitutions in the SWS1 opsin sequence are responsible blue-shifting the spectral sensitivity of the opsin from violet sensitive (λ max = 400) to ultraviolet sensitive (λ max = 310–360). [37]
The human eye is relatively insensitive to indigo's frequencies, and some people who have otherwise-good vision cannot distinguish indigo from blue and violet. For this reason, some later commentators, including Isaac Asimov, [11] have suggested that indigo should not be regarded as a color in its own right but merely as a shade of blue or ...
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.
Blue cone monochromacy - a rare form of monochromacy with only functional S-cones; Congenital red–green color blindness - partial color blindness include protanopia, deuteranopia, etc. Oligocone trichromacy - poor visual acuity and impairment of cone function according to ERG, but without significant color vision loss. [15]
Monochromacy, a type of color vision deficiency; Monochromatic color; Monochrome monitor, used with computers; Monochrome photography, also known as black-and-white photography; Monochrome painting, a style of painting that uses a single color (excluding shades thereof) Monochrome printmaking, printing styles that generate black-and-white images
They allow for the possibility of color vision through the comparison of absorbance across different types of cones. [10] According to Marshall et al., most animals in the marine habitat possess no or relatively simple color vision. However, there is a greater diversity in color vision in the ocean than there is on land.
Color vision is categorized foremost according to the dimensionality of the color gamut, which is defined by the number of primaries required to represent the color vision. This is generally equal to the number of photopsins expressed: a correlation that holds for vertebrates but not invertebrates .
Predicting the color of a compound can be extremely complicated. Some examples include: Cobalt chloride is pink or blue depending on the state of hydration (blue dry, pink with water) so it is used as a moisture indicator in silica gel. Zinc oxide is white, but at higher temperatures becomes yellow, returning to white as it cools.