Understanding contrast ratio
Learn why contrast ratio matters for accessibility and how to check it before publishing your site.
With Framer, you have full control over your website’s look and feel. Before launching, it’s important to make sure your color contrast meets accessibility standards so your content is easy to read for everyone.
What is contrast ratio
Contrast ratio describes the difference in luminance between two colors. It’s most commonly measured between foreground elements, such as text or icons, and their background.
Contrast ratio is expressed on a scale from 1:1 to 21:1. Higher values indicate stronger contrast. Adequate contrast improves readability and visibility, especially for people with visual impairments, color blindness, or other perception-related conditions.
WCAG guidelines for contrast ratio
The Web Content Accessibility Guidelines (WCAG) define minimum contrast requirements to support accessible digital experiences.
Under WCAG 2.1 Level AA, the recommended minimum contrast ratios are:
4.5:1 for normal text
3:1 for large text, defined as 18pt or 14pt bold
Meeting these thresholds helps ensure your content is readable across a wide range of devices and viewing conditions.
Tools to check contrast ratio
Before publishing your site, use a contrast checker to verify that your color combinations meet accessibility requirements. These tools can help:
What is a contrast ratio and why is it important for accessibility?
Contrast ratio is the difference in luminance between two colors, typically between foreground (text or graphics) and background. It’s measured on a scale from 1:1 to 21:1, with higher values indicating greater contrast. A sufficient contrast ratio ensures readability and visibility, especially for users with visual impairments, color blindness, or other perception-related conditions.
What are the WCAG guidelines for contrast ratio in digital design?
According to WCAG 2.1, Level AA compliance requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18pt or 14pt bold).
How can I check if my design meets the recommended contrast ratio standards?
Before publishing, it is suggested to use contrast ratio checkers such as the WebAIM Contrast Checker, UseContrast website, or the Colour Contrast Checker Chrome extension to ensure your site meets contrast ratio guidelines and creates a more accessible experience for all users.
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