HEX, RGB, and HSL aren't three arbitrary formats — they're the same color expressed for three different purposes. HEX is compact and copy-paste friendly, which is why it dominates CSS and design-tool exports. RGB is the literal channel intensities a screen renders, which is why it's the natural format for canvas drawing and programmatic color blending. HSL describes a color by its position on the color wheel (hue), intensity (saturation), and brightness (lightness) — which is why it's the easiest format for deriving related colors, since darkening or lightening a color is just changing one number (lightness) instead of recalculating three interdependent channels.
What this tool accepts
Enter a HEX code or adjust the RGB/HSL values directly, and the other two formats update instantly — the conversion math (RGB↔HSL) runs client-side using the standard color-space formulas, so the visual result stays identical across all three representations. Both 6-digit (#6366f1) and 3-digit shorthand (#fff) HEX are accepted; the shorthand is expanded automatically. One thing to know: it doesn't currently accept CSS named colors (typing "tomato" or "skyblue" won't resolve to a hex value) — input is HEX codes or numeric RGB/HSL values only.
Why HSL is worth learning if you only know HEX
The practical case for HSL is deriving states from a base color without a design tool: a hover state that's "10% darker," a subtle background tint that's "the same hue at 95% lightness," a disabled state that's "desaturated" — all of these are one-number changes in HSL (lightness or saturation) but require recalculating all three RGB channels by hand or with a library. If your CSS variables are defined in HSL components (--brand-h, --brand-s, --brand-l), deriving new shades becomes arithmetic instead of guesswork.
Common uses
- Converting a HEX value from a design handoff into the RGB format a Canvas or SVG filter API expects
- Deriving hover/active/disabled states from a brand color by adjusting HSL lightness or saturation
- Building a table of a brand color's equivalent values across HEX/RGB/HSL for a design-system doc
- Quickly checking what a HEX code from a mockup actually looks like before committing it to code
FAQ
Can I type a CSS color name like "tomato" or "skyblue"?
Not currently — input is limited to HEX codes and numeric RGB/HSL values. You'd need to look up the named color's hex equivalent separately first.
Is the conversion mathematically accurate?
Yes — RGB↔HSL uses the standard color-space conversion formulas, so the same color stays visually identical across all three representations; nothing is approximated or rounded lossily beyond normal display precision.
Does this tool send my colors to a server?
No. All conversion math runs locally in your browser; nothing is transmitted anywhere.
Is there a limit to how many colors I can convert?
No — conversion is instant and fully local, so there's no rate limit on how many colors you convert.