What is the minimum contrast ratio for WCAG compliance?

WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text (18pt+). AAA requires 7:1 for normal text and 4.5:1 for large text.

Does this tool check color blindness accessibility?

While we don't simulate color blindness views, our contrast calculations ensure sufficient luminance difference which is crucial for all users including those with color vision deficiencies.

Can I check contrast for UI elements like buttons?

Yes, our tool works for any interface elements that require sufficient contrast against their background, including buttons, form controls, and icons.

What color formats does the contrast checker support?

We support all major web color formats including HEX (#FFFFFF), RGB (rgb(255,255,255)), and HSL (hsl(0,100%,100%)).

Is this tool suitable for ADA compliance checking?

Yes, meeting WCAG 2.1 contrast ratios helps comply with ADA digital accessibility requirements for text readability.

Is the contrast checker completely free to use?

Yes, our contrast checker is 100% free with no limitations, registration requirements, or hidden costs.

Free Online Color Contrast Checker - WCAG 2.1 Compliance Tool

Free Online Contrast Checker Tool

Our professional tool helps designers and developers ensure their color combinations meet WCAG 2.1 accessibility standards for text readability.

Key Features:

Real-time contrast ratio calculation

WCAG 2.1 AA/AAA compliance indicators

Supports HEX, RGB, and HSL color formats

Visual preview of text on background

Copy color values with one click

Detailed accessibility recommendations

100% free with no registration required

Example Usage:

Web Accessibility:

Ensure text meets WCAG standards for all users

UI/UX Design:

Test button, link, and form field contrast

Brand Compliance:

Verify brand colors work accessibly together

Essential for web developers, UI designers, accessibility specialists, and anyone creating digital content that needs to meet accessibility standards.

How to Use the Color Contrast Checker Tool

1. Select Colors

Use the color picker or type values (HEX/RGB/HSL) for text and background colors.Click the 📋 button to copy any color value.

2. View Preview

See how your color combination looks in real-time.The sample text updates automatically as you adjust colors.

3. Check Results

View the contrast ratio (e.g., 4.5:1).See WCAG compliance ratings (AA/AAA).Read the accessibility feedback message.

4. Adjust as Needed

If contrast is too low, try darker/lighter variations.Use the copy feature to save compliant color combinations.

Contrast Checker FAQ

Frequently Asked Questions

Frequently Asked Questions About Contrast Checking

Below are some common questions about using our online contrast checker tool.

What contrast ratio is required for WCAG compliance?
WCAG 2.1 requires at least 4.5:1 for normal text (AA) and 7:1 for AAA compliance. Large text (18pt+) requires 3:1 for AA.
What color formats does the tool support?
We support HEX (#FFFFFF), RGB (rgb(255,255,255)), and HSL (hsl(0,100%,100%)) color formats.
Does this check contrast for color blindness?
While we don't simulate color blindness, we do evaluate luminance contrast which is critical for all vision types.
Can I check contrast for non-text elements?
Yes, the tool works for any elements requiring sufficient contrast, like icons or form controls.
Is this tool suitable for ADA compliance?
Yes, meeting WCAG contrast ratios helps comply with ADA digital accessibility requirements.
Is the Contrast Checker completely free?
Yes, our Contrast Checker is 100% free with no limitations or hidden costs.