RGB ↔ CMYK Converter
Convert RGB colors to CMYK percentages for print, or CMYK back to RGB for screen. Free and private, right in your browser.
RGB → CMYK
CMYK → RGB
Convert colors between RGB (the additive red/green/blue model your screen uses) and CMYK (the subtractive cyan/magenta/yellow/black model used for print), so you can check how a screen color will translate to ink or go the other way from a Pantone/print swatch back to an RGB or hex value for digital use.
How to use it
- Enter a color as RGB values or a hex code
- Read off the converted CMYK percentages (or vice versa)
- Copy the values you need for your design or print file
Frequently asked questions
- Why does my CMYK print look different from the RGB I saw on screen?
- RGB is additive light (screens) and CMYK is subtractive ink (paper), so they cover different color ranges - CMYK can't reproduce many bright RGB blues and greens. This tool uses the standard math conversion, not your printer's ICC profile, so treat the result as a close estimate and always check a proof print for anything color-critical.
- What formula does the converter use?
- It uses the common device-independent formula: K = 1 - max(R,G,B), then C, M, Y are derived from K and each channel. It's the same baseline formula used in most design software's quick preview, though real print shops apply their own ICC color profiles for final output.
- Can I convert a hex code instead of typing R, G, B numbers?
- Yes - paste a hex value like #1E90FF and it's parsed into RGB automatically before converting to CMYK, so you don't need to look up the decimal values yourself.
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Nothing is uploaded
The file never leaves your device. There is no server to send it to, so there is nothing to leak, log, or subpoena.
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No signup, no limits
No account, no email, no daily cap, no watermark, and no paid tier waiting behind the third file.
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Works offline
Load the page once and it keeps working with the network off, because all the work was always happening locally.