![]() Ideally, you want to achieve the highest contrast ratio that still meets your brand’s colors. That’s why the 4.5:1 contrast ration is considered the minimum. These examples meet the minimum contrast requirements, but you can see that they are not the easiest to read and would be even more challenging if a long paragraph was written this way. Blue (#4D29DB) on a teal background (#83D1D8).For reference, here are examples of text with a contrast ratio of 4.5:1: Text larger than 18 pixels or fonts that are 14 pixels and bold can have a contrast ratio of 3:1 and still be compliant. The minimum acceptable contrast ratio for WCAG 2.1 AA compliance is 4.5:1 for body text or any smaller font sizes 18 pixels and below. The ratio of foreground to background color that is needed to be accessible depends upon the size of the text and the level of conformance with Web Content Accessibility Guidelines (WCAG) you are seeking to meet (AA or AAA). What degree of color contrast is needed for accessibility? In this screenshot from a website, you can see that there are two main elements where color contrast can impact readability – the black text on the pink background and the white text on the darker pink button. For example, black text is much easier to read on a white background than is very light gray text. ![]() The greater difference between the foreground color, the easier it is to read and vice versa. ![]() The measure of brightness is expressed as a ratio of the foreground color to the background, which ranges from 1:1 (white text on a white background) to 21:1 (black text on a white background). In web design, the foreground color usually refers to the color of text or icons that are overlaid on a colored background, button, or background image.
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