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Normal Vision
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Contrast Ratio Checker
Contrast Ratio
21:1
WCAG AA Normal Text
Pass
WCAG AA Large Text
Pass
WCAG AAA Normal Text
Pass
WCAG AAA Large Text
Pass
Sample Text
Large Text
About Vision Impairments
Color Blindness
Affects approximately 8% of men and 0.5% of women. The most common type is red-green color blindness (protanopia and deuteranopia).
Low Vision
Includes conditions like cataracts, glaucoma, and macular degeneration. These affect contrast sensitivity, visual field, and clarity.
WCAG Guidelines
Web Content Accessibility Guidelines recommend a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (AA level).