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  2. Template:Color contrast ratio/doc - Wikipedia

    en.wikipedia.org/wiki/Template:Color_contrast...

    1 Usage. Toggle Usage subsection. 1.1 Examples with light background. 1.2 Examples with dark background. 2 WCAG 2.0. 3 See also. Toggle the table of contents ...

  3. Template:Color contrast ratio - Wikipedia

    en.wikipedia.org/wiki/Template:Color_contrast_ratio

    G18: Ensuring that a contrast ratio of at least 4.5:1 exists between text (and images of text) and background behind the text Index of Color Contrast Samples The above documentation is transcluded from Template:Color contrast ratio/doc .

  4. Contrast (vision) - Wikipedia

    en.wikipedia.org/wiki/Contrast_(vision)

    Contrast is the difference in luminance or color that makes an object (or its representation in an image or display) visible against a background of different luminance or color. [1] The human visual system is more sensitive to contrast than to absolute luminance; thus, we can perceive the world similarly despite significant changes in ...

  5. Template:Greater color contrast ratio - Wikipedia

    en.wikipedia.org/wiki/Template:Greater_color...

    This template is used on approximately 157,000 pages. To avoid major disruption and server load, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage.

  6. Wikipedia:Colour contrast - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Colour_contrast

    An example of how text with low colour-contrast appear to someone with the commonest form of colour-blindness, red/green. If you have default settings on Wikipedia, and are reading this page on a screen, then you probably can't read the following: This is a secret message. because it has blue text on a blue background.

  7. Chubb illusion - Wikipedia

    en.wikipedia.org/wiki/Chubb_illusion

    The Chubb illusion is similar to another visual illusion, the contrast effect.The contrast effect is an illusion in which the perceived brightness or luminance of an identical central visual target form on a larger uniform background varies to the test subject depending on the ratio of the central form's luminance to that of its background. [4]

  8. Help:Using colours - Wikipedia

    en.wikipedia.org/wiki/Help:Using_colours

    Typically they take a web page or image file as an input, and render a colour-blind simulated image as output: Mozilla Firefox color-blind addons; Sim Daltonism simulates color blind vision and displays the results in a floating palette for macOS and iOS. Freeware. Color Oracle downloadable, free color blindness simulator for Windows, Mac and ...

  9. Eigengrau - Wikipedia

    en.wikipedia.org/wiki/Eigengrau

    For example, the night sky looks darker than Eigengrau because of the contrast provided by the stars. Contrast threshold data, collected by Blackwell [5] and plotted by Crumey, shows Eigengrau occurring at adaptation luminances below approximately 10 − 5 cd m −2 (25.08 mag arcsec −2). [6] This is a limiting case of Ricco's law.