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Use this calculator to test color contrast ratios and quickly validate WCAG AA/AAA pass status. It is useful for designers, developers, and content teams improving readability and inclusive UX.
Last updated: April 7, 2026
Need complete accessibility checks? Explore this category
Contrast Ratio
17.4:1
AA (Normal)
Pass
AAA (Normal)
Pass
AA (Large)
Pass
AAA (Large)
Pass
Excellent contrast for most text contexts, including stringent accessibility targets.
Always test contrast in real UI states (hover, focus, disabled, dark mode).
We can build and embed a custom version of Contrast Ratio Accessibility Calculator for your brand and workflow.
Computes luminance-based contrast ratio between text and background colors.
Shows pass/fail outcomes for normal and large text thresholds.
Provides concise recommendations to increase readability and compliance.
Text `#1A1A1A` on background `#FFFFFF` yields a strong ratio and passes WCAG AA/AAA for standard text contexts.
Contrast Ratio
~17:1
AA (Normal)
Pass
AAA (Normal)
Pass
Contrast ratio is based on relative luminance of foreground and background colors. The formula compares the lighter color to the darker color and expresses the result as a ratio.
Contrast Ratio: (Lighter + 0.05) / (Darker + 0.05)AA Normal Text: 4.5:1 or higherAAA Normal Text: 7:1 or higherPair contrast checks with font sizing and cognitive load evaluation for better end-to-end readability.
Explore Accessibility & Ergonomics CalculatorsResult: Contrast comfortably passes AA and AAA for normal text.
Still verify component states and theme variants to avoid regressions.
Share it with product teams improving WCAG compliance and visual readability.
Suggested hashtags: #Accessibility #WCAG #ContrastRatio #DesignSystem #UX