ZeroUtil

Color Converter

Convert colors between HEX, RGB, HSL and CMYK formats.

HEX#3b82f6
RGBrgb(59, 130, 246)
HSLhsl(217, 91%, 60%)
CMYKcmyk(76%, 47%, 0%, 4%)

How to Use the Color Converter

Enter a color in any supported format — HEX, RGB or HSL — and see it instantly converted to all other formats including CMYK. Use the color picker to choose a color visually.

Supported Input Formats

  • HEX — #ff0000 or ff0000 (3- and 6-digit shorthand supported)
  • RGB — rgb(255, 0, 0) or rgb(255 0 0)
  • HSL — hsl(0, 100%, 50%) or hsl(0 100% 50%)

Output Formats

  • HEX — 6-digit hexadecimal color code
  • RGB — Red, green, blue values (0-255)
  • HSL — Hue (0-360), saturation (0-100%), lightness (0-100%)
  • CMYK — Cyan, magenta, yellow, key/black (0-100%)
  • CSS Name — shown when the color matches a named CSS color

Click "Copy" next to any format to copy the value to your clipboard. All processing happens in your browser — no data is sent to any server.

Frequently Asked Questions

What color formats can I enter?

You can enter colors in HEX (#ff0000 or ff0000), RGB (rgb(255, 0, 0)) or HSL (hsl(0, 100%, 50%)) format. Both 3-digit and 6-digit HEX codes are supported.

How is CMYK calculated?

CMYK values are calculated from RGB using the standard formula. Note that screen CMYK is an approximation — for print-accurate CMYK you should use a color profile in a design application.

What is a CSS color name?

CSS defines 148 named colors (like "red", "coral", "navy"). When your color matches one of these names exactly, it is displayed below the preview swatch.

Does this tool support alpha/transparency?

The converter currently focuses on opaque colors (no alpha channel). RGBA and HSLA inputs are accepted but the alpha value is ignored in the output.

Is my data sent to a server?

No. All conversions happen locally in your browser. Nothing is uploaded.

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