Accessibility Calculators
Color Contrast
Readability Score
Color Contrast Ratio Calculator
Enter foreground and background colors (Hex or RGB format, e.g., #333, #e7f3ff, rgb(20, 40, 60)) to check WCAG 2.1 contrast compliance.
Ratio: ---
Normal Text (AA)
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(Ratio needed: 4.5:1)
Large Text (AA)
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(Ratio needed: 3:1)
Normal Text (AAA)
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(Ratio needed: 7:1)
Large Text (AAA)
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(Ratio needed: 4.5:1)
Readability Score Calculator
Paste your text below to calculate common readability scores (Flesch Reading Ease & Flesch-Kincaid Grade Level).