Runs entirely in your browser - no upload, no sign-up.
Screen color output
#E86800
Each RGB channel is the light left after its opposing ink and black ink are applied. Values are rounded to the nearest whole number.
255 x (1 - 0) x (1 - 0.09)= 232255 x (1 - 0.55) x (1 - 0.09)= 104255 x (1 - 1) x (1 - 0.09)= 0A CMYK to RGB converter turns cyan, magenta, yellow and black ink percentages into red, green and blue screen values. Enter the four CMYK channels to see a live color preview, copy RGB or HEX output and inspect the exact profile-free formula used for the estimate.
Set cyan, magenta, yellow and key values from 0 to 100 using the sliders or number fields.
The swatch, rounded RGB channels and six-digit HEX value update immediately.
Copy the CSS rgb() value, HEX code or plain channel values with one click.
Open the conversion math to see how each CMYK channel and black value produced the result.
CMYK describes ink coverage for print, while RGB describes emitted light on a screen. This converter applies the standard device-independent math in your browser, so your values are never uploaded.
Use the result as a fast digital preview, not as a press proof. Paper, ink, calibration and an ICC profile can all change how the physical color appears.
Yes. You can convert as many CMYK colors as you need without an account, download or usage limit. The RGB, HEX, preview and formula breakdown are all available for free.
No. The conversion runs locally in your browser with simple JavaScript math. Your CMYK values do not need to be sent to a server, so the result appears immediately on your device.
Enter cyan, magenta, yellow and key percentages from 0 to 100. Decimal percentages are accepted. The converter flags empty, non-numeric and out-of-range values instead of silently changing them.
First divide each CMYK percentage by 100. Then calculate R = 255 x (1 - C) x (1 - K), G = 255 x (1 - M) x (1 - K), and B = 255 x (1 - Y) x (1 - K). Round each result to a whole number.
CMYK and RGB are device-dependent color spaces. This converter uses a profile-free mathematical estimate, while an actual press depends on its ink, paper, calibration, rendering intent and ICC profile. Use color-managed design software for production proofing.
Yes in this mathematical model. When K is 100%, the shared factor (1 - K) becomes zero, so red, green and blue all become 0 regardless of the cyan, magenta and yellow values.