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Color Contrast Calculator

Check if your color combinations meet WCAG guidelines for accessibility.

Color Selection

Choose your foreground and background colors

Foreground (Text)
#000000
Background
#FFFFFF
Preset Combinations

Color Preview

See how your colors look together

Heading Text

This is how your text will look with these colors.

The quick brown fox jumps over the lazy dog.

Test different UI elements using the tabs above

Contrast Analysis

WCAG 2.1 accessibility guidelines

21.00:1

AAA Compliant

✓
AA Large
✓
AA Normal
✓
AAA Large
✓
AAA Normal

WCAG AA Guidelines:

  • Normal Text: Pass (4.5:1 required)
  • Large Text: Pass (3:1 required)

WCAG AAA Guidelines:

  • Normal Text: Pass (7:1 required)
  • Large Text: Pass (4.5:1 required)

How to Use Color Contrast Calculator

Check if your color combinations meet WCAG guidelines for accessibility and ensure readable designs.

How It Works

  • Select your foreground (text) color using the color picker or hex input
  • Choose your background color using the second color picker
  • View the real-time contrast ratio calculation
  • Check WCAG compliance levels (AA and AAA) for both normal and large text
  • See a live preview of how your text will look with the selected colors

WCAG Contrast Guidelines

  • AA Level (minimum): Requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text
  • AAA Level (enhanced): Requires a contrast ratio of at least 7:1 for normal text and 4.5:1 for large text
  • Large Text: Defined as text that is at least 18pt (24px) or 14pt (18.7px) and bold

Why Color Contrast Matters

  • Accessibility: Essential for users with low vision or color vision deficiencies
  • Readability: Improves text readability for all users in varying lighting conditions
  • Legal Compliance: Required for accessibility compliance in many jurisdictions
  • Professional Design: Creates a more polished and professional appearance
  • User Experience: Reduces eye strain and improves overall usability
Accessibility
Design
WCAG
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