Algorithmic Theming Engines: Building Self-Correcting Color Systems With `contrast-color()`

📰 Smashing Magazine

Learn to build self-correcting color systems with CSS using the `contrast-color()` function to improve web accessibility

intermediate Published 28 May 2026

Action Steps

Apply the `contrast-color()` function to your CSS to automatically adjust text colors for sufficient contrast
Test your website's color scheme using accessibility tools to identify areas for improvement
Use the `contrast-color()` function in conjunction with other CSS features to create a robust design system
Configure your design system to utilize the `contrast-color()` function for all text elements
Compare the accessibility of your website before and after implementing the `contrast-color()` function

Who Needs to Know This

Designers and front-end developers can benefit from this technique to ensure their websites meet basic WCAG contrast checks and improve overall user experience

Key Insight

💡 The `contrast-color()` function in CSS can automatically adjust text colors to ensure sufficient contrast, improving web accessibility

Key Takeaways

Learn to build self-correcting color systems with CSS using the `contrast-color()` function to improve web accessibility

Full Article

Seventy percent of websites still fail basic WCAG contrast checks in 2025. After years of design system tooling, accessibility linters, and JavaScript libraries, nothing moved the needle. We didn’t need better libraries. We needed better CSS. `contrast-color()` is that better CSS.

Read full article → ← Back to Reads