Color conversion

CMYK to RGB color conversion

CMYK to RGB color conversion. Exact conversion factors, worked examples, and privacy-first browser calculation on CalculatorX. Fast and free.

Instant result

Result

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Enter values to convert.

Inputs —

Mode —

Formula —

Formulas

Core equations used by this converter.

RR = 255 × (1 − C) × (1 − K)

GG = 255 × (1 − M) × (1 − K)

BB = 255 × (1 − Y) × (1 − K)

isRGB-style 8-bit channels (0–255) unless noted. Calculation runs locally in your browser.

How to use

Choose CMYK → RGB or RGB → CMYK

Use the tabs in the converter to switch direction.

Enter CMYK or RGB values

CMYK uses 0–100% channels; RGB uses 0–255.

Convert and read the result

Use Convert or let the result update automatically.

Example conversions

Common values with formula and result.

cmyk(0, 1, 1, 0) → RGB

R = 255 × 1 × 1 = 255

rgb(255, 0, 0)

cmyk(0, 0, 0, 1) → RGB

→ rgb(0, 0, 0)

rgb(0, 0, 0)

cmyk(1, 0, 0, 0) → RGB

→ rgb(0, 255, 255) (cyan)

rgb(0, 255, 255) (cyan)

CMYK to RGB color conversion specification

Version 1.1.0 · Engine tested

Calculation status

Engine tested 3 published cases
Named expert review Not performed
Calculation version 1.1.0

Review policy

Definition: **CMYK** — cyan, magenta, yellow, and black (key) ink amounts, typically **0–1** or **0–100%**. **RGB** — red, green, blue light **0–255** for displays.
What it calculates: Convert CMYK to RGB (0–255). Approximate formulas, print-to-screen notes, worked examples, and color chart.
Inputs: Values required by the selected conversion mode
Outputs: Converted result in the target unit or format
Formula: R = 255 × (1 − C) × (1 − K) · G = 255 × (1 − M) × (1 − K) · B = 255 × (1 − Y) × (1 − K)
CMYK to RGB table: Color name CMYK (C,M,Y,K) RGB Hex
Black (0, 0, 0, 1) (0, 0, 0) #000000
White (0, 0, 0, 0) (255, 255, 255) #FFFFFF
Red (0, 1, 1, 0) (255, 0, 0) #FF0000
Green (1, 0, 1, 0) (0, 255, 0) #00FF00
Blue (1, 1, 0, 0) (0, 0, 255) #0000FF
Yellow (0, 0, 1, 0) (255, 255, 0) #FFFF00
Cyan (1, 0, 0, 0) (0, 255, 255) #00FFFF
Magenta (0, 1, 0, 0) (255, 0, 255) #FF00FF
Assumptions: Conversion runs locally in the browser; values are not uploaded.
Uses the formulas documented on this page.
Units: R
G
B
Boundary conditions: Empty or invalid input yields no valid result.
Out-of-range values may be rejected by the tool runtime.
Example: cmyk(0, 1, 1, 0) → RGB → rgb(255, 0, 0)
Validation cases: cmyk(0, 1, 1, 0) → RGB → rgb(255, 0, 0)
cmyk(0, 0, 0, 1) → RGB → rgb(0, 0, 0)
cmyk(1, 0, 0, 0) → RGB → rgb(0, 255, 255) (cyan)
Sources: CalculatorX converter runtime
Standard unit / encoding definitions where applicable
Calculation version: 1.1.0

Color name	CMYK (C,M,Y,K)	RGB	Hex
Black	(0, 0, 0, 1)	(0, 0, 0)	#000000
White	(0, 0, 0, 0)	(255, 255, 255)	#FFFFFF
Red	(0, 1, 1, 0)	(255, 0, 0)	#FF0000
Green	(1, 0, 1, 0)	(0, 255, 0)	#00FF00
Blue	(1, 1, 0, 0)	(0, 0, 255)	#0000FF
Yellow	(0, 0, 1, 0)	(255, 255, 0)	#FFFF00
Cyan	(1, 0, 0, 0)	(0, 255, 255)	#00FFFF
Magenta	(0, 1, 0, 0)	(255, 0, 255)	#FF00FF

Background

Interpretation and common distinctions.

Use the converter tabs to switch direction when available. Results for CMYK to RGB color conversion update locally in your browser.

Frequently asked questions

Key distinctions behind the conversion.

How do you convert using CMYK to RGB color conversion?

Use R = 255 × (1 − C) × (1 − K). Example: cmyk(0, 1, 1, 0) → RGB → rgb(255, 0, 0).

Can I switch direction?

Open the related reverse converter listed under Related tools.

Does this run online or locally?

Calculation runs locally in your browser. Values are not uploaded.

How precise are the results?

Results follow the formulas on this page. Round to the precision your use case needs.