Rule: Color contrast of text: Minimum

Rule ID	Color 1
Conformance	Required
Definition	Text content must exceed minimum Color Contrast Ratio (CCR) of 3 for large and/or bolded text and 4.5 for any other size or style of text.
Purpose	The higher the color contrast of text the more easy it is to read, especially for people with visual impairments.
Conformance	Required
WCAG Success Criteria	Success Criterion 1.4.3 Contrast (Minimum) Other Related Success Criterion: Success Criterion 1.4.1 Use of Color Success Criterion 1.4.6 Contrast (Enhanced)
Rule Category	Color/Content
Rule Scope	Element
Techniques	Change the foreground color to a more complementary color to the background color. Change the background color to a more complementary color to the foreground color. Remove background images or verify they do not compromise color contrast requirements.
Information Links	WCAG Success Criterion 1.4.3 Contrast (Minimum): The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, with exceptions How to meet Success Criterion 1.4.3 Contrast (Minimum): The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, with exceptions G17: Ensuring that a contrast ratio of at least 7:1 exists between text (and images of text) and background behind the text G18: Ensuring that a contrast ratio of at least 4.5:1 exists between text (and images of text) and background behind the text G148: Not specifying background color, not specifying text color, and not using technology features that change those default G174: Providing a control with a sufficient contrast ratio that allows users to switch to a presentation that uses sufficient contrast