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Magenta is variously defined as a purplish-red, reddish-purple, or a mauvish–crimson color. On color wheels of the RGB and CMY color models, it is located midway between red and blue, opposite green. Complements of magenta are evoked by light having a spectrum dominated by energy with a wavelength of roughly 500–530 nm.
Pattern blocks sets are multiple copies of just six shapes: Equilateral triangle (Green) 60° rhombus (2 triangles) (Blue) that can be matched with two of the green triangles; 30° Narrow rhombus (Beige) with the same side-length as the green triangle; Trapezoid (half hexagon or 3 triangles) (Red) that can be matched with three of the green ...
However, the blue triangle has a ratio of 5:2 (=2.5), while the red triangle has the ratio 8:3 (≈2.667), so the apparent combined hypotenuse in each figure is actually bent. With the bent hypotenuse, the first figure actually occupies a combined 32 units, while the second figure occupies 33, including the "missing" square.
The process is commonly described in terms of Ben Day dots, but other shapes can be used, such as parallel lines or textures. [ 3 ] Depending on the effect, color, or optical illusion needed, small colored dots are closely spaced, widely spaced, or overlapping. [ 4 ]
Recommendations 2005 (Red Book) RSC Publishing 0-85404-438-8 2001 Recommendations 2000 (Red Book II) (supplement) 0-85404-487-6 1990 Recommendations 1990 (Red Book I) Blackwell 0-632-02494-1 1971 Definitive Rules 1970 [9] Butterworth 0-408-70168-4 1959 1957 Rules - 1940/1941 1940 Rules Scientific journals
Gradient RGB/CMY color wheel Seven-color and twelve-color color circles from 1708 (attributed to Claude Boutet) Wilhelm von Bezold's 1874 Farbentafel. A color wheel or color circle [1] is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors, secondary colors, tertiary colors etc.
The earliest such deck in the US is by J. Y. Humphreys who created the "Seminole Wars Deck" in 1819, which had four colored suits of blue spades, green clubs, red hearts and yellow diamonds. [3] In the German game of skat the official tournament standard since the 1990s is to use a no-revoke deck known as a Turnierbild deck. In these decks ...
In the Munsell color system, this color at its maximum chroma of 12 is called Red-Purple, or more specifically Munsell 5RP. Artists' pigments and colored pencils labeled as purple are typically colored the red-violet color. On an RYB color wheel, the so-called red-violet color is the color between red and violet.