AppHelp guide
HEX, RGB, and HSL Color Conversion
Learn how HEX, RGB, and HSL describe the same color, when designers and developers use each format, and how to avoid alpha and shorthand mistakes.
Quick answer
HEX is compact for CSS and design tokens, RGB is explicit about channel values, and HSL is easier for adjusting hue, saturation, and lightness. Convert colors when moving between design tools, CSS, screenshots, and documentation.
Use HEX for compact CSS tokens
HEX values are short and common in design specs, CSS variables, and documentation. Six-digit HEX stores red, green, and blue channels; eight-digit HEX also includes alpha transparency.
Use RGB for channel-level checks
RGB makes each color channel visible as a number from 0 to 255. It is useful when comparing screenshots, generated colors, and API values that already expose red, green, and blue fields.
Use HSL for adjustments
HSL separates hue from saturation and lightness, which makes it easier to create hover states, tints, shades, and related palette colors without manually recalculating each RGB channel.
Frequently asked questions
When should I use HSL instead of HEX?
Use HSL when you need to adjust hue, saturation, or lightness. Use HEX when you need a compact token for CSS or design documentation.
What does alpha mean in a color value?
Alpha controls transparency. It may appear as rgba(), hsla(), or eight-digit HEX depending on the format.