Overview
Convert an RGB color value to its CMYK equivalent, or reverse the process, using the standard device-independent conversion formula. This is the same math-based approximation most online color tools use - it doesn't account for a specific printer's ICC color profile or actual ink behavior, so treat the result as a close approximation for screen-to-print planning rather than an exact match to real printed output. A live color swatch shows the result so you can visually sanity-check the conversion. Runs entirely client-side.
Best for: Estimating the CMYK values for a color before sending a design to print
How to use this tool
- Choose a direction. RGB to CMYK, or CMYK back to RGB.
- Enter your color value. e.g. rgb(242, 183, 5) or cmyk(0%, 24%, 98%, 5%).
- See the result and swatch. The converted value updates live, with a color preview to sanity-check it.
Frequently asked questions
No - this uses the standard device-independent RGB-CMYK formula, not a specific printer's ICC color profile. Real print output depends on the printer, ink, and paper, so treat this as a close approximation for planning, not a color-accurate proof.
The formula used here maximizes the K (black) channel and minimizes C, M, and Y whenever possible, which is standard for a simple conversion - real print workflows often use "rich black" (adding some CMY to K) for deeper black, but that's a print-production choice this basic conversion doesn't make for you.