RGB vs HEX: What Is the Difference and Which Should You Use?
Learn how RGB and HEX represent the same screen colors, how to convert between them, and when each format is more convenient in CSS, design tools and handoff.
Color learning center
Color guides for web and UI work
Eight practical, long-form articles covering color formats, accessibility, CSS, palettes, print conversion and transparency.
HSL Color Guide: Hue, Saturation and Lightness Explained
A practical guide to HSL colors, including hue, saturation, lightness, CSS syntax, palette adjustments, alpha and common mistakes.
Color Contrast Accessibility: A Practical WCAG Guide for UI Colors
Understand color contrast ratios, WCAG thresholds, text and UI considerations, alpha, testing workflows and common accessibility mistakes.
CSS Color Formats Explained: HEX, RGB, HSL and Modern Options
Compare common CSS color formats, alpha syntax, browser-friendly workflows and modern color spaces so you can choose the right notation for a project.
RGB to CMYK for Print: What Web Designers Need to Know
Learn why RGB-to-CMYK conversion is only an approximation in the browser, how print color management works, and how to prepare colors for professional output.
How to Build a Practical Color Palette for a Website or App
A step-by-step approach to building UI color palettes with roles, scales, states, accessibility checks and maintainable design tokens.
Web Color Accessibility Beyond Contrast: States, Meaning and Themes
Go beyond simple text contrast with practical guidance for color-only meaning, focus states, form errors, charts, dark mode and accessible theming.
Alpha and Opacity in Web Colors: RGBA, HSLA and 8-Digit HEX
Understand alpha channels, opacity, compositing, transparent CSS colors, 8-digit HEX and how transparency affects contrast and UI design.
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