Color Converter

Three Ways to Describe the Same Color

Web and application developers juggle at least three color formats every day. Hex (#7dd3fc) is the most compact and the default in design tools and CSS. RGB (rgb(125, 211, 252)) exposes the three 8-bit channels directly and is convenient when you are doing math on colors or talking to code that wants integer components. HSL (hsl(199, 95%, 74%)) uses hue/saturation/lightness, which is the format that maps most intuitively to how people actually think about color — “make it a little darker” or “pick a color at the same hue but more saturated” is natural in HSL and painful in hex or RGB. Modern CSS also supports rgba() and hsla() with an alpha channel, plus newer color spaces like lab(), lch(), and oklch() for perceptually uniform palettes.

Why HSL Beats RGB for Theming

If you are building a design system or a dark-mode theme, HSL is the format you want to work in. Generating a palette of related colors — lighter and darker shades, complementary colors, accent variations — is trivial in HSL (change the lightness or rotate the hue) and painful in hex or RGB (requires converting to HSL, modifying, and converting back). This site’s theme uses CSS custom properties with HSL values so the same hue can be reused at different lightness levels without duplicating the base color. The converter gives you a live swatch preview so you can see what a given value looks like before committing.

Design Systems and Theme Implementation

A real design system is more than a palette — it is a set of rules for how colors, type, spacing, and components compose, enforced in code so the UI stays consistent as it grows. I build custom applications with maintainable theming architectures, accessible color contrast, and clean dark-mode implementations from the start rather than bolted on at the end. Learn about custom application development or get in touch to discuss your UI and design system work.