Module:Color contrast/doc
 | This is a documentation subpage for Module:Color contrast. It may contain usage information, categories and other content that is not part of the original module page. |
 | This module is rated as ready for general use. It has reached a mature state, is considered relatively stable and bug-free, and may be used wherever appropriate. It can be mentioned on help pages and other Wikipedia resources as an option for new users. To minimise server load and avoid disruptive output, improvements should be developed through sandbox testing rather than repeated trial-and-error editing. |
 | This Lua module is used on approximately 575,000 pages. To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them. |
 | This module depends on the following other modules: |
This module is used primarily by
- {{Color contrast ratio}}
- {{RGBColorToLum}}
- {{Color contrast conformance}}
- {{Ensure AAA contrast ratio}}
- {{Ensure AA contrast ratio}}
- {{Greater color contrast ratio}}
It is also used for tracking within
and for documentation in
The formulas used are stated in WCAG 2.x specifications. WCAG is the main guideline for creating accessible interfaces on the web.
Usage
[edit]To use this module, you may use one of the above listed templates or invoke the module directly
- To compute relative luminescence:
{{RGBColorToLum|color}}or{{#invoke:Color contrast|lum|color}} - To compute a contrast ratio between two colors:
{{Color contrast ratio|color1|color2|error=?}}or{{#invoke:Color contrast|ratio|color1|color2|error=?}} - To determine which of two colors (color2a and color2b) has the greater contrast ratio with a particular color (color1):
{{Greater color contrast ratio|color1|color2a|color2b}}or{{#invoke:Color contrast|greatercontrast|color1|color2a|color2b}} - To compute the contrast ratio between the background and text colors specified in a css style string:
{{#invoke:Color contrast|styleratio|css style statement string|default background color|default text color}}