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In each row, the "base color" is the simplest representation of the hue. The other colors are derived from the base color by varying its lightness in HSL to achieve the necessary WCAG contrast ratio, which is defined as a ratio of slightly modified CIE relative luminance values.
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
As a guide to selecting foreground and background colors for text, the Web Content Accessibility Guidelines 2.0 (guideline 1.4) classifies contrast ratios for ordinary text as follows: WCAG 2.0 text contrast ratios
This template determines the pair of colors with the larger contrast ratio: color1/color2 or color1/color3. This is useful for selecting a foreground/background color pair.
An LCD technology is dynamic contrast (DC), also called advanced contrast ratio (ACR), and smart contrast ratio (SCR [4]) and various other designations.When there is a need to display a dark image, a display that supports dynamic contrast underpowers the backlight lamp (or decreases the aperture of the projector's lens using an iris), but proportionately amplifies the transmission through the ...
Accessibility at AOL is about extending the power of the internet to all users and make it available to everyone. Use keyboard shortcuts to control video content on AOL Learn how to control the Unified Player for video using keyboard shortcuts.
The table at Wikipedia:Manual of Style/Accessibility/Colors shows the results for 14 hues of finding the darkest or lightest backgrounds that are AAA-compliant against black text, white text, linked text and visited linked text. Google Chrome has a color contrast debugger with visual guide and color-picker.
The "luminance contrast" is the ratio between the higher luminance, L H, and the lower luminance, L L, that define the feature to be detected.This ratio, often called contrast ratio, CR, (actually being a luminance ratio), is often used for high luminances and for specification of the contrast of electronic visual display devices.