What is the minimum contrast ratio for WCAG AA compliance?

For WCAG AA compliance, normal text requires a minimum contrast ratio of 4.5:1, while large text (18pt or 14pt bold) requires 3:1.

What is the difference between WCAG AA and AAA standards?

WCAG AAA requires higher contrast ratios: 7:1 for normal text and 4.5:1 for large text, compared to AA's 4.5:1 and 3:1 respectively.

How do I fix poor color contrast?

Use our automatic fix feature to adjust either text or background colors while maintaining your design intent, or manually adjust colors using HSL sliders with visual indicators showing optimal zones for AA/AAA compliance.

What are the visual indicators on the adjustment sliders?

The green zones and AA/AAA markers show optimal ranges for achieving WCAG compliance. The direction hints (Lighter/Darker) guide you toward better contrast based on your current color combination.

Can I test custom color combinations?

Yes, you can enter any hex color codes or use the color picker to select custom colors. The URL updates automatically so you can share specific color combinations.

Color Contrast Checker - WCAG AA & AAA Compliance Tool

1.00:1

Kontras

Fail

Trè pòv

Tèks Nòmal

AA (4.5:1)

✖

AAA (7:1)

✖

Tèks gwo

AA (3:1)

✖

AAA (4.5:1)

✖

Koulè Tèks

#FFFFFF

#ffffff

Koulè Background

#546E7A

#546e7a

Koreksyon rapid

Tit Apèsi

Chyen mawon rapid la sote sou chen parese a

Egzanp tèks ti (12px)

Tèks

#ffffff

Background

#546e7a

Estanda WCAG

Level AA

Rapò kontras minimòm de 4.5:1 pou tèks nòmal ak 3:1 pou gwo tèks. Oblije pou pifò sit entènèt.

Level AAA

Amelyore rapò kontras 7:1 pou tèks nòmal ak 4.5:1 pou gwo tèks. Rekòmande pou pi bon aksè.

Kontras ensifizan pou tout gwosè tèks - pa satisfè estanda WCAG yo.

Tcheke Kontras Koulè

Kalkile rapò kontras ant tèks ak koulè background.

Chwazi yon koulè ak seleksyonè koulè a pou tèks ak koulè background oswa antre yon koulè nan fòma rgb egzadesimal (egzanp, #259 oswa #2596BE). Ou ka ajiste glisè a pou chwazi koulè. Règleman Pwogramatik Aksesibilite (WCAG) gen yon gid espesyal pou ede detèmine si tèks la li pou itilizatè ki wè. Kritè sa a itilize yon algorit apati, metòd pou konte konbinezon koulè nan rapò konparab. Dapre fòmil sa a, WCAG di ke yon rapò kontras koulè 4.5:1 ak tèks ak background li se adekwa pou tèks nòmal (tèks kò), ak gwo tèks (18+ pt nòmal, oswa 14+ pt fonse) ta dwe gen omwen yon rapò kontras 3:1.

Karakteristik kle

• Kalkil rapò kontras an tan reyèl
• Tcheke konformite WCAG AA & AAA
• Glisè HSL pou ajisteman presi
• Plizyè fòma aperçu

Zouti avanse

• Koreksyon koulè otomatik
• Egzanp tèks ak background
• Deteksyon non koulè
• Ekspòte rezilta yo