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Chromostereopsis. Blue–red contrast demonstrating depth perception effects. 3 Layers of depths "Rivers, Valleys & Mountains". Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey ...
A monochrome[ 1] or monochromatic image, object or palette is composed of one color (or values of one color). [ 2] Images using only shades of grey are called grayscale (typically digital) or black-and-white (typically analog). In physics, monochromatic light refers to electromagnetic radiation that contains a narrow band of wavelengths, which ...
These are often Red Ensigns (e.g., Bermuda) or Blue Ensigns (e.g., New South Wales and Anguilla). A small number have backgrounds of other colors (e.g. British Antarctic Territory and Niue) or a unique pattern in the field (e.g. British Indian Ocean Territory and Hawaii).
Bhutan (with distinct yellow and orange) Hanover (1837–1866) Hindu flag (with distinct orange) Jacksonville, Florida, United States (with a distinct gold and orange and a brown emblem) Jerusalem cross – flag used by several Crusader states. Kędzierzyn-Koźle, Poland (with multicolored coat of arms)
Frequency. Red–green: 8% males, 0.5% females (Northern European descent) [ 2] Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [ 2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem ...
Impossible color. The human eye's red-to-green and blue-to-yellow values of each one-wavelength visible color [citation needed] Human color sensation is defined by the sensitivity curves (shown here normalized) of the three kinds of cone cells: respectively the short-, medium- and long-wavelength types. Impossible colors are colors that do not ...
Black ( Sable) Black flag. Flag of Afghanistan. Flag of Afghanistan (variant) Flag of Afghanistan (1901–1919) Flag of Afghanistan (1919–1921) Flag of Afghanistan (1921–1926) Flag of Afghanistan (1926–1928) Flag of the Islamic Republic of Afghanistan.
The national flag of the Republic of Karelia is a rectangle with equal horizontal stripes: the upper stripe is red, the middle one is blue and the lower is green. 1997– Flag of the Komi Republic: The flag is a horizontal tricolour composed of three bars of, from top to bottom, medium blue, green, and white.