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CSS 2, SVG and CSS 2.1 allow web authors to use system colors, which are color names whose values are taken from the operating system, picking the operating system's highlighted text color, or the background color for tooltip controls.
To use a colour in a template or table you can use the hex triplet (e.g. #CD7F32 is bronze) or HTML color name (e.g. red).. Editors are encouraged to make use of tools, such as Color Brewer 2 to create Brewer palettes, listed at MOS:COLOR for color scheme selection used in graphical charts, maps, tables, and webpages with accessibility in mind for color-blind and visually impaired users.
For lines of CSS which should be different on different MediaWiki projects, e.g. for a different background color for easy distinction, clearly the local CSS cannot be used; at least these lines should be put in the user subpages. Some computers, e.g. in internet cafes, mobile devices/tablets, do not allow users to set preferences for the browser.
Web colors provides a list of colors which can be used. Simple colors, like black, blue, red, green, etc. can just be spelled out. Alternatively, colors can be specified using either RGB or hex notation.
For the box background, the saturation is 4% and brightness is 100%. For the ITN/OTD sections, the saturation and brightness scheme is the same as above, but the hue (color) is different. Same goes for the Today's featured picture section. --Aude (talk | contribs) 01:58, 11 April 2006 (UTC) Perfect.
Many of these web colors are used as background colors for table cell templates, particularly in the yellow-green-cyan hue range.For the blue-magenta-red range, some of these templates use slightly darker colors to achieve slightly more intense colorfulness in specific cases.
Sites that use CSS with either XHTML or HTML are easier to tweak so that they appear similar in different browsers (Chrome, Internet Explorer, Mozilla Firefox, Opera, Safari, etc.). Sites using CSS " degrade gracefully " in browsers unable to display graphical content, such as Lynx , or those so very old that they cannot use CSS.
For text against a white background, the following CSS colors do not meet the minimum contrast ratio (4.5:1) specified by Web Content Accessibility Guidelines (WCAG) 2.0 Level AA. Contrast [ d ] Color sample