Color Contrast Checker
Check WCAG AA/AAA color contrast ratios. Live text preview, color blindness simulation, accessibility badges.
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L: 1.0000
6.70:1
AA
L: 0.1067
WCAG 2.1 Accessibility Levels
Normal Text (≥4.5)
✓AA
✗AAA
Large Text (≥3)
✓AA
✓AAA
UI Components (≥3)
✓AA
1:13:14.5:17:121:1
Auto-fix to compliant color
Already meets AA.
Live Preview
The quick brown fox jumps over the lazy dog.
The quick brown fox jumps over the lazy dog.
The quick brown fox jumps over the lazy dog.
Button
Quick Presets
Color Blindness Simulation
The quick brown fox jumps over the lazy …
Deuteranopia (Red-Green)
10.00:1
✓AA
The quick brown fox jumps over the lazy …
Protanopia (Red-Green)
9.16:1
✓AA
The quick brown fox jumps over the lazy …
Tritanopia (Blue-Yellow)
3.36:1
✗AA
WCAG 2.1 Reference
• Normal text — AA: ≥4.5:1 / AAA: ≥7:1
• Large text (≥18pt or ≥14pt bold) — AA: ≥3:1 / AAA: ≥4.5:1
• UI components & graphics — AA: ≥3:1
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📖 How to Use
1
Upload document
Drag-drop or pick file.
2
Set options
Choose operation and parameters.
3
Process
Server runs the task.
4
Download
Get result in your format.
Frequently asked questions
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