Color & CSS Guides
1 articleColor is one of the most powerful tools in a designer's arsenal — it communicates brand identity, establishes visual hierarchy, guides user attention, and evokes emotional responses. But implementing color effectively in digital products requires understanding both the artistic principles and the technical constraints: how different color models (HEX, RGB, HSL, oklch) represent color mathematically, why contrast ratios matter for accessibility compliance, and how to build systematic color palettes that work across light and dark themes. These guides bridge design theory and CSS implementation, giving you the knowledge to make informed color decisions and translate them into production-ready code that meets WCAG accessibility standards.
What You'll Learn
- Color model comparison: HEX, RGB, HSL, and the perceptually uniform oklch color space
- WCAG color contrast: calculating ratios, meeting AA/AAA standards, and fixing violations
- Dark mode color palettes: systematic approaches to creating accessible dark themes
- CSS color functions: color-mix(), oklch(), relative color syntax, and browser support
- Gradient design: creating smooth, vibrant gradients without muddy midtones
- Color accessibility: beyond contrast ratios — color blindness simulation and inclusive design
Why This Matters
Approximately 300 million people worldwide have color vision deficiency, and WCAG color contrast compliance is a legal requirement under the ADA, EAA, and Section 508. Beyond legal compliance, accessible color choices improve readability and usability for all users. These guides help you build products that are both beautiful and inclusive.