How to choose a readable color for a website?
Complete guide to selecting readable colors on the web. Discover contrast rules, best practices and mistakes to avoid.
Try our free tool
No registration required, 100% local processing.
Readability is the foundation of every successful user experience. A website can be beautiful, but if visitors struggle to read the content, they'll leave within seconds. Choosing readable colors isn't just about aesthetics — it's a functional necessity that directly impacts engagement, conversion, and your site's accessibility.
Yet this issue is often overlooked. Talented designers create visually appealing combinations that fail the most basic readability tests. An elegant gray on white? Unreadable for 30% of visitors. White text on a background image? A lottery depending on image zones. These mistakes cost conversions and exclude part of your audience.
This guide teaches you to master the scientific principles behind color readability. You'll discover how to evaluate contrast, which combinations work universally, and how to use our tools to validate your choices before production.
Table of contents
How to do it in 3 steps
Identify your main background color (usually white, cream, or very light gray for text content).
Use our readability tool to test different text colors. Start with dark grays and adjust until reaching a minimum 4.5:1 ratio.
Validate each combination of your palette with the WCAG analyzer. Note the ratios and compliance levels (A, AA, AAA).
Simulate your palette with our colorblindness tool to verify it remains readable for all vision types.
Export your validated colors with contrast notes for your design system documentation.
Pro tips
- WCAG AAA ratio (7:1) is recommended for long texts like blog articles — your readers will thank you.
- Create an accessible 'text-muted' color: instead of standard gray, use a gray tinted with your brand color for more warmth.
- On colored backgrounds, pure white can be glaring; try off-white or cream for more comfort.
- Light fonts (thin, light) require higher contrast than regular or bold fonts.
Common mistakes to avoid
- ✗Using medium gray (#808080) for secondary text — this gray is at the readability limit and often fails tests.
- ✗Testing readability only on your own well-calibrated screen, forgetting that most users have less performant displays.
- ✗Confusing hue contrast and luminance contrast — very different colors can have the same luminance and be unreadable together.
- ✗Neglecting placeholders and help texts that are often in unreadable gray by default.
- ✗Forgetting to test dark mode where contrast rules are reversed.
- ✗Ignoring analysis tool warnings thinking 'it looks fine visually'.
Complementary tools
Frequently asked questions
Related articles
Ready to try?
Our tool is free, no registration required and respects your privacy.
Try Lisibilité texte now