CMYK to HSB Converter

Convert CMYK print color values into HSB / HSV (hue, saturation, brightness).

CMYK Input

C (%)M (%)Y (%)K (%)

HSB / HSV

Hue

17°

Saturation

87%

Brightness

95%

hsb(17, 87%, 95%)

How CMYK to HSB conversion works

CMYK is a subtractive model used for print, describing color as percentages of cyan, magenta, yellow, and black (key) ink. HSB (Hue, Saturation, Brightness) — also called HSV — is the cylindrical model designers use on screen, where hue is the angle on the color wheel (0°–360°), saturation is how vivid the color is, and brightness is how light or dark it is. There is no direct CMYK-to-HSB formula, so this tool first converts CMYK to RGB (scaling each channel by its complementary ink and dimming by the black component), then derives hue, saturation, and brightness from that RGB value. Because this skips color management, the result is a close on-screen approximation rather than a calibrated print proof. Everything runs locally in your browser. For the reverse direction see HSB to RGB, or use Color Converter to convert between all color formats at once.

Built and maintained by Meet Shah · Last updated 1 August 2026

What this tool is used for

Getting an HSB approximation of a print colour for a design tool.
Producing a starting value from a printer's ink specification.
Comparing a print palette against a screen one in one model.
Getting a hue and brightness figure a designer can adjust from an ink specification.
Understanding roughly how a CMYK colour reads on screen.

Frequently Asked Questions

What is this conversion actually for?: Taking a colour specified for print and getting it into the model a design tool lets you adjust. CMYK numbers are unadjustable by hand — making something lighter means changing up to four inks — while HSB gives one axis per intuition.
Why does 100% brightness not mean bright ink?: Because brightness after conversion describes the reflected result, and even 0/0/0/0 — bare paper — is only as bright as the stock. A CMYK mix converted to HSB can read 100% brightness while the printed sheet is visibly duller than the screen showing it.
How does the black channel show up in HSB?: Almost entirely as reduced brightness, with little effect on hue or saturation. That is the useful intuition: K is a brightness control in disguise, which is why converting a K-heavy mix produces a low-brightness HSB value at roughly the hue you expected.
Why do two different CMYK mixes give the same HSB?: Because CMYK is over-determined — the same colour can be built with more coloured ink and less black, or the reverse. Grey component replacement is exactly that trade, and it is invisible in HSB while making a real difference to ink cost and drying.
Is the round trip back to CMYK reliable?: Only for the colour, not for the ink recipe. HSB has three numbers and CMYK has four, so converting back picks one canonical mix rather than the one you started with — usually a different balance of coloured ink to black for the same visible result.

Common errors and gotchas

Expecting an exact match, since CMYK is device-dependent and the conversion is approximate.
Ignoring the colour profile, which determines the printed result more than the numbers.
Confusing HSB with HSL as the destination, which changes the numbers entirely.
Reading HSB brightness as ink density, which are unrelated despite both being percentages.
Confusing HSB with HSL at the destination, which changes every number before you compare them.