A number one versions of Mosaic and Netscape Navigator used the X11 color names when the basis for their colour lists, when two began as X Window System applications. A origin of the X11 colour names is unknown. [http://lists.w3.org/Archives/Public/www-style/2002May/0138.html]

Hex triplet

The whammy triplet occurs as vi-digit, deuce-ace-byte hexadecimal number used inside HTML and CSS, and more computing applications, to represent colors. A bytes represent a red, green & blue components of the color. Of these byte is the total withinside the range 00 to FF (in hexadecimal notation), or even 0 to 255 in decimal notation. A curse triplet is formed by concatenating troika bytes inside hexadecimal notation, in the charted sequentially: For instance, assume a color in which a red/green/blue values come decimal figures: red=36, green=104, blue=160 (the greyish-grey-blue color). A decimal amounts 36, 104 & 160 come Two dozen, 68 & A0 severally within hexadecimal notation. To obtain a curse triplet, i just write a triplet curse bytes together forswearing spaces, so: 2468A0. Whenever a byte is less than Xvi (decimal) or even Decade (whammy) it must exist as represented using the leading zero to keep the total of digits in the triplet adequate to half a dozen. E.g., a decimal triplet 0,1,2 would become represented per whammy triplet 000102.

A total of colors that may be represented by this models is

HTML color names

A HTML 4.01 specification defines sixteen known when colors, as follows:

X11 color names

Additionally, the total of colors come defined by web browsers such as Internet Explorer or Mozilla Firefox. The particular web browser might not recognize a lot one colors, however when of 2005 all modern general-use browsers trend lines a to the full listing. Several one colors come from either a listing of X11 color names distributed with a X Window System. These colors were standardized by SVG 1.0, and are accepted by SVG Full user agents. It is non a portion of SVG Tiny. A bit of of the children, along using their hex equivalents, come used beneath.

Web-safe colors

An additional placed of 216 color values come usually considered to exist as a "web-safe" colour palette; developed at once whenever several computer screen were sole capable of displaying simply 256 colors. The placed of colors was required that can be shown forgoing dithering on 256-color displays; the total 216 was chosen partially becautilise computer operating systems customarily reserved sixteen to twenty colors for their have use; it was too selected because it allows exactly vi shades both of red, green, & blue. (6 × 6 × 6 = 216). A palette was 1st identified by Lynda Weinman.

"Web-safe" colors got the flaw therein, in systems like X Window where a palette is shared between applications, little colour cubes (5x5x5 or even 4x4x4) were typically allocated by browsers - so, the "web safe" colors would actually dither in such systems. Better final result were found by providing an image by owning a big range of colors & leaving the web browser to quantize the color space if required, like than suffer the quality loss of a double quantisation.

Per early years of the 21st century, caused per needs of computer game & digital exposure, microcomputer generally got at least Xvi-bit color & ordinarily Two dozen-bit (truecolor). Possibly roving equipment experienced at least Xvi-bit color, caused per inclusiin of cameras on cellphones. A apply of "web-safe" colors fell into neglect, however persisted when folklore.

A "web-safe" colors don't keep close at hand list, however to each one may be specified by an RGB triplet. In the table in the image below, the trio-digit total is utilized as a stenography notation for the hexad-digit hex number above. A digit "3" is same to the hex number "33"; "C" is same to "CC". E.g., "F63" in the table following is same to "#FF6633" in the models utilized antecedently. Beneath come a values for the Captain hicks shades of every colour away from 256 conceivable color shades.

This table shows completely of the "web-safe" colors, underlining a really-safe (watch next subdivision) colors:

Really web safe colors

Designers were typically encouraged to stick to these 216 "web-safe" colour their websites; still, Ogdoad-bit color displays were very much additional green whenever a 216-color palette was developed than it is okay,. David Lehn & Hadley Tail own since found that single Xxii of the 2Xvi colour the web-safe palette come dependably displayed while forgoing inconsistent remapping in 16-bit computer displays. It known as these Xxii colors a "really safe" palette; it consists primarily of shades of green & yellow, equally may be seen in a table above, in which the "really safe" colors come underlined.

CSS Colors

A Cascading Style Sheets language defines a equivalent total of known when colors as a HTML Four specification, videlicet the Sixteen enrolled above. In addition, CSS Two.One adds a 'orange' color title to the names:

CSS Two, SVG and CSS 2.One as well allow web authors to utilize thus-supposed models colors, which come then colour list whose values are taken from either a operating system. This enables web authors to style their content within line using a operating formulas of the user professional. Understand [http://www.w3.org/TR/CSS21/ui.html#system-colors]. As of early 2004, it appears that the CSS3 colour module might over again drop these values, marking the two deprecated, but this could vary: [http://www.w3.org/TR/css3-color/#css2-system].