Why Your Choice of Color Format Actually Matters
Picking the right color format is not just a style preference — it changes how maintainable and readable your code is over time. A HEX code like #3B82F6 is compact and universally understood by every tool, browser, and team member, which makes it the natural default for global stylesheets. But the moment you need to generate variations — a darker hover state, a lighter background, a full 10-step palette — HEX becomes a black box. You can't look at #3B82F6 and immediately know how to make it 10% lighter. With HSL, you can: it's hsl(217, 91%, 60%), so 70% lightness gives you a noticeably lighter version. That kind of direct reasoning is why HSL has become the preferred format for design systems and CSS custom properties. RGB sits in the middle — it maps directly to how screens render color and is required when passing color values to JavaScript canvas APIs, WebGL shaders, or certain image processing libraries.