Color Format Converter: HEX, RGB & HSL in Sync

HEX, RGB and HSL are three different ways of writing down the exact same color, and design tools, CSS and brand guidelines tend to mix all three depending on context. This converter keeps them in sync so you never have to do the math by hand or second-guess whether a converted value is right.

Why the same color has three names

RGB describes a color as three channel intensities, red, green and blue, each from 0 to 255. HEX is just RGB rewritten in base 16 instead of base 10, so #2D5BFF and rgb(45, 91, 255) are exactly the same color with zero conversion loss. HSL takes a different approach entirely, describing a color by hue, the position on a color wheel from 0 to 360 degrees, saturation, how intense or muted it is, and lightness, how close to black or white it is.

HEX vs RGB vs HSL, when to use each

HEX is the most compact and the standard for CSS, brand style guides and design tools. RGB is useful when you need to reason about individual channel values, for example when blending or comparing colors programmatically. HSL is the easiest to adjust by hand, since holding hue steady while sliding lightness produces a clean set of tints and shades of the same base color, which is exactly how most systematic color palettes are built.

A note on rounding

Converting between RGB and HSL involves trigonometric-style division that can introduce small rounding differences, typically within a rounding point on saturation or lightness. Converting between HEX and RGB, by contrast, is always exact, since HEX is simply RGB in a different base with no math involved beyond reformatting the digits.