CSS Color & Gradients: From Hex to oklch and Beyond
A complete, practical guide to color on the web — hex, rgb and hsl, the modern oklch space, alpha and transparency, currentColor, color-mix, linear/radial/conic gradients, color stops and hard stops, multiple backgrounds and background-clip, dark mode with prefers-color-scheme, contrast and accessibility, common mistakes, and hands-on exercises with solutions.