What it does
The tool parses the color you enter, applies standard color-space formulas, and displays every equivalent form side by side. Nothing leaves your device — the calculation runs locally in the browser, the same way CSS itself is interpreted on the client side without a server round trip.
How to use
- Type a HEX code such as #1a73e8, or fill in the RGB, HSL, or CMYK fields directly.
- Fine-tune the sliders or numeric fields until the live swatch matches the color you need.
- Copy the exact line your project requires — CSS hex, an rgb() function, hsl(), or CMYK percentages.
Features
- A live color swatch updates as you edit, so the result is confirmed before you copy it.
- All four formats appear at once, removing the need to jump between separate calculators.
- The page keeps working offline once it has loaded, since no server call is involved.
Use cases
- Matching a HEX value from a design file to an hsl() token used in a CSS theme.
- Getting an approximate CMYK reading before sending artwork to a print shop, then confirming it against the shop's own ICC profile.
- Explaining to a teammate why the same blue looks slightly different on a screen and in a printed brochure.
Examples
- #2563eb converts to rgb(37, 99, 235).
- hsl(221 83% 53%) corresponds to a HEX value commonly used for primary blue interfaces.
Common mistakes
- CMYK values on a screen are only an approximation; the printed result still depends on paper stock and the printer's ink profile.
- An eight-digit HEX code includes an alpha (transparency) channel, which some older software does not expect from a six-digit HEX field.
FAQ
Which format should I use in CSS?
HEX and hsl() are both common in modern CSS. HEX stays compact for static colors, while hsl() makes it easier to adjust lightness for hover and focus states. rgb() is equally valid syntax.
Is CMYK exact?
Not on a screen. Browser-based CMYK is an approximation for reference only; commercial printing should rely on the print shop's own ICC color profile.
Do you store my colors?
No color values are stored or uploaded. The conversion happens entirely inside your browser session.
Conclusion
One accurate source color, expressed correctly in every format a project needs — that consistency keeps developers, designers, and print vendors working from the same value instead of guessing at translations.
