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Text Color and Size

  • Provide a contrast ratio for the color of text and its background color of 4.5:1 for font sizes below 18 points.
  • If the font size is large (greater than 18 points) the contrast ratio should be 3:1 or more.
  • Provide text that is still readable when zoomed in 200%. Zoom in to this level and then shrink the page to a very narrow width. The text should not break.
  • When color is used to convey meaning, a second method must also be used. For example, use a shape and color.
  • Color along should not be used to identify a link.

Test the color contrast using the Web AIM Color Contrast Checker [1] or Check My Colours [2].

Source URL:https://web.library.yale.edu/site-resources-help/accessibility/text-color-and-size

Links
[1] http://webaim.org/resources/contrastchecker/ [2] http://www.checkmycolours.com/