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カラーコントラストチェッカー

アクセシブルなWebデザインのためにWCAG 2.1 AA/AAAカラーコントラスト比を確認

rgb(304159)

rgb(248250252)

Preview

Sample Text Aa

The quick brown fox jumps over the lazy dog

Regular body text — this is how a paragraph will appear at 16 px.

Small helper text at 14 px — used for captions and labels.

13.98:1
Contrast Ratio
AA — Normal Text4.5:1
< 18pt (24px) regular or < 14pt (18.67px) bold
AA — Large Text3:1
≥ 18pt (24px) regular or ≥ 14pt (18.67px) bold
AAA — Normal Text7:1
Enhanced, < 18pt regular
AAA — Large Text4.5:1
Enhanced, ≥ 18pt regular
Foreground Color
HEX
#1E293B
RGB
rgb(304159)
Background Color
HEX
#F8FAFC
RGB
rgb(248250252)

Color Contrast Checker — WCAG AA/AAA

Check whether your text and background color combination meets WCAG 2.1 accessibility standards. Shows contrast ratio and pass/fail for AA (4.5:1) and AAA (7:1) levels.

FAQ

What is WCAG?

The Web Content Accessibility Guidelines (WCAG) are international standards for making web content accessible to people with disabilities, including color vision deficiencies.

What contrast ratio do I need?

WCAG AA requires 4.5:1 for normal text and 3:1 for large text (18px+ bold or 24px+). AAA requires 7:1 for normal and 4.5:1 for large.

Why does color contrast matter?

Low-contrast text is hard to read for people with low vision, color blindness, or in bright sunlight. It also affects your legal compliance in many jurisdictions.

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