Convert CSS color formats

Enter one complete color expression, choose the format you need, and receive a clean, copy-ready value. The converter validates the notation before calculating, clamps numeric channels to their valid ranges, and reports malformed input instead of silently guessing. That makes it useful for quick stylesheet work as well as repeatable build tools and data-cleaning pipelines.

Enter a complete and recognizable color expression

Start with one color in a supported notation: three- or six-digit HEX such as <code>#f80</code> or <code>#ff8800</code>, comma-separated <code>rgb()</code>, percentage-based <code>hsl()</code>, or percentage-based <code>cmyk()</code>. Function names are case-insensitive, but their structure is deliberate. RGB takes three numeric channels, HSL takes a numeric hue followed by two percentages, and CMYK takes four percentages. Include the leading hash for HEX and the required percent signs for saturation, lightness, cyan, magenta, yellow, and black. This strict grammar prevents an incomplete value from being interpreted as a different color. Whitespace around comma-separated components is accepted, so values copied from stylesheets or design notes normally work unchanged. Alpha channels, CSS color names, modern space-separated CSS syntax, and unrelated color spaces are outside this capability’s scope. If the text does not match one of the four documented forms, the request returns an invalid-input error that identifies the malformed notation rather than producing a plausible but unreliable result.

Understand clamping, conversion, and rounding

Once the expression is structurally valid, every numeric channel is constrained to the range defined by its color model. RGB channels are clamped from 0 through 255. HSL hue is clamped from 0 through 360, while saturation and lightness stay from 0 through 100 percent. Every CMYK component also stays from 0 through 100 percent. Clamping is useful when generated data slightly overshoots a boundary: <code>rgb(300, -8, 20)</code> becomes the same color as <code>rgb(255, 0, 20)</code>. It does not repair missing channels, misspelled functions, or absent percent signs; those are malformed input and remain errors. Conversion uses deterministic sRGB arithmetic. HEX and RGB outputs round their channels to whole integers because those formats conventionally use byte values. HSL and CMYK outputs retain up to two decimal places and omit unnecessary trailing zeros. The result also identifies both the detected source format and requested target format, which helps automated callers confirm that the intended parsing path was used.

Use the returned value in CSS and production workflows

The response contains a normalized value ready to copy, plus compact source and target labels. HEX is emitted as uppercase six-digit notation. RGB, HSL, and CMYK use consistent commas and spacing, making snapshots and generated files stable across repeated runs. In front-end work, this is handy when a design token arrives in one representation but a component library expects another. In automation, validate imported theme settings before committing them to a token catalogue, normalize colors from form submissions, or convert rows from a content feed without installing a graphics dependency. Remember that CMYK describes a mathematical conversion here, not a printer-specific ICC profile or a guarantee of physical ink appearance. Likewise, the conversion does not preserve alpha because alpha input is not supported. Browser use is suited to quick individual conversions, while API requests cost $0.002 each and make the same deterministic operation available to scripts, build systems, tests, and controlled batch jobs.