CMYK to HSV (HSB) converter
Enter the cyan, magenta, yellow and black percentages and get HSV values, the model behind the color pickers in Photoshop and Figma.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter cyan (c), magenta (m), yellow (y) and black (k).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
With the percentages as fractions: R = 255 × (1 - C) × (1 - K), G = 255 × (1 - M) × (1 - K), B = 255 × (1 - Y) × (1 - K). Then (RGB kept unrounded): With max and min of R/255, G/255, B/255 and d = max - min: V = max, S = d / max (0 when max = 0), and H comes from the largest channel: 60 × ((G - B) / d mod 6), 60 × ((B - R) / d + 2) or 60 × ((R - G) / d + 4).
Example
Inputs: Cyan (C) = 60 %, Magenta (M) = 20 %, Yellow (Y) = 0 %, Black (K) = 20 %. Result: HSV code: hsv(200, 60%, 80%); Hue (H): 200 °; Saturation (S): 60 %.
Limits and caveats
- CMYK uses the naive device-independent formula with no ICC profile, so it will not match a specific press, paper or ink.
- Values in the code are rounded to one decimal, so converting back can shift an RGB channel by 1.
- All values are treated as sRGB, the default web color space, not Display P3 or Adobe RGB.
Questions about this tool
When is V equal to 100 minus K?
When one of C, M or Y is zero. Otherwise V = (100 minus the smallest channel) × (100 minus K) / 100.
In what form do I enter CMYK values?
Enter each channel as a percentage from 0 to 100, as design apps show it, not as a fraction from 0 to 1.
Is HSV the same as HSB?
Yes. They are two names for one model; V (value) and B (brightness) mean the same thing, and Photoshop labels it HSB.