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Professional bidirectional RGB and CMYK color code converter. Fix screen-to-print color shifts and get accurate, real-time conversion results.
Arithmetic CMYK conversion only; no ICC profile, paper or ink conditions are used. This is not a proof of printed colour.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
RGB stores a color as red, green, and blue channel values from 0 to 255. HEX is a compact text notation for those same channels, such as #3B82F6. CMYK describes color with cyan, magenta, yellow, and black percentages; this page uses whole-number percentages from 0% to 100%.
Enter an RGB or HEX color and read its CMYK estimate, or adjust the CMYK values and see the corresponding RGB, HEX, and on-screen swatch. The fields update one another, and common presets, a color picker, reset, and copy controls help with a single color at a time. This is a numeric color-space conversion, not an image converter.
RGB describes colors of emitted light on a display; CMYK describes printing inks. A numeric conversion without a printer and paper profile cannot promise a particular printed appearance. The W3C CSS Color Module discusses device-dependent CMYK and calibrated color profiles, illustrating why print workflows need color-management context. See CSS Color Module Level 5 for that distinction.
The displayed conversion uses rounded channel values. Rounding can make a reverse conversion differ from the starting RGB or CMYK values, even when the change is small. Treat the values as a convenient color notation estimate for comparison and handoff, rather than a press-ready separation.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Keep the default swatch, choose a preset, use the color picker, or enter a valid HEX value. You can also adjust the red, green, and blue channels directly.
Read C, M, Y, and K as whole-number percentages. If your workflow starts from CMYK, adjust those four fields instead and review the corresponding RGB and HEX values.
Copy an individual value or the combined color details. Make small edits in the source color space and inspect the swatch and rounded outputs again.
The default blue is #3B82F6, equivalent to RGB values 59, 130, and 246. Its displayed CMYK values are rounded, so use the page’s current result when checking a particular color.
Use cases
See how the tool fits into real work and everyday tasks.
Copy a HEX value for a web handoff and keep the matching RGB and CMYK readouts nearby for discussion with a print vendor.
Enter a supplied HEX or RGB value, then compare the estimate with a CMYK specification while allowing for whole-number rounding.
Adjust one ink percentage at a time and watch the RGB notation and screen swatch respond, then copy the resulting values for a draft.
Q&A
Find concise answers to common questions and confusing cases.
No. The conversion has no printer, ink, paper, or output profile selection. Use the print provider’s color-managed workflow and a proof when appearance matters.
The CMYK percentages and RGB channels are rounded for display. Converting rounded values back to another color space can shift a channel or percentage.
No. This page converts one color value at a time. It does not process image files or batch palettes.
Notes
Review scope, result limitations, and important precautions before use.
An on-screen swatch depends on the display and is not a physical print proof. CMYK output depends on the intended printing conditions, including the device and profile; this converter does not select or apply those conditions. Ask the print provider for required profile values and proofing steps before using numbers for a production run.
Use the rounded result for reference and communication. For brand-critical or regulated color work, verify the value in the destination application and production workflow rather than relying on a generic RGB-to-CMYK estimate.
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