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Download as PDF; Printable version; In other projects ... Achromatic grays are colors between black and white with no hue. ... 25 (6): 435–441.
A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.
This 4-bit RGBI schema is used in several platforms with variations, so the table given below is a simple reference for the palette richness, and not an actual implemented palette. For this reason, no numbers are assigned to each color, and color order is arbitrary. Note that "dark white" is a lighter gray than "bright black" in this example.
Image:Map of USA-bw.png – Black and white outlines for states, for the purposes of easy coloring of states. Image:BlankMap-USA-states.PNG – US states, grey and white style similar to Vardion's world maps. Image:Map of USA with county outlines.png – Grey and white map of USA with county outlines.
Check (also checker, Brit: chequer, or dicing) is a pattern of modified stripes consisting of crossed horizontal and vertical lines which form squares.The pattern typically contains two colours where a single checker (that is a single square within the check pattern) is surrounded on all four sides by a checker of a different colour.
Template: Periodic table ... Download as PDF; Printable version; In other projects ... 1.25 Yb – Ac 1.1 Th 1.3 Pa 1.5 U 1.38 Np 1.36 Pu 1.28 Am
Following the Weber–Fechner law, at the start of the 20th century human lightness perception was assumed to be logarithmic.In 1903, The New International Encyclopædia illustrated this concept by stating that given a black and white with a luminance ratio of 1:60 ( : ), the geometric mean had to be used to find the middle gray. [10]
Carbon tissue, a layer of unsensitized pigmented gelatin on a thin paper support sheet, [1] was introduced by British physicist and chemist Joseph Swan [2] [3] in 1864. [4] Marketing began in 1866. Initially, his ready-made tissues were sold in only three colors: black, sepia and purple-brown. [1] [3] Eventually, a wide array of hues became ...