CMYK to RGB Converter

Convert CMYK color values to RGB, HEX, HSL, and other color formats. Professional tool for designers, developers, and print professionals.

Conversion Formula: RGB = (1 - C) × (1 - K) × 255, (1 - M) × (1 - K) × 255, (1 - Y) × (1 - K) × 255

Where CMYK values are expressed as decimals from 0 to 1

CMYK Input Values

Cyan (C)
Magenta (M)
Yellow (Y)
Black (K)
Resulting Color

Common Color Presets

Red
Green
Blue
Black
White
Brand Red
Brand Green
Brand Blue
Color Conversion Results
RGB Color
rgb(128, 128, 0)
Red, Green, Blue values (0-255 each)
Red (R)
Green (G)
Blue (B)
HEX Color
#808000
Hexadecimal color code for web
HSL Color
hsl(60, 100%, 25%)
Hue, Saturation, Lightness
HSV/HSB
hsv(60, 100%, 50%)
Hue, Saturation, Value/Brightness
XYZ Color
XYZ(15, 21, 3)
CIE 1931 color space

Color Harmony

Complementary
#800080
Analogous 1
#808000
Analogous 2
#008000
Triadic 1
#008080
Triadic 2
#800080
Darker Shade
#404000
Lighter Tint
#c0c000
Split Comp. 1
#804000

Color Accessibility

Contrast Ratio (vs White): 4.5:1
Contrast Ratio (vs Black): 8.7:1
WCAG Rating: AA Excellent

Color Properties

Luminance: 0.18
Color Temperature: Warm
Perceived Brightness: Medium

Understanding CMYK and RGB Color Spaces

CMYK and RGB are two fundamental color models used in different media. CMYK (Cyan, Magenta, Yellow, Key/Black) is a subtractive color model used in color printing. RGB (Red, Green, Blue) is an additive color model used for electronic displays like monitors and TVs.

CMYK (Subtractive Color Model):

Used for printing, CMYK works by subtracting brightness from white. When you mix all CMYK colors at maximum, you get black (in theory). In practice, a separate black ink (K) is used because mixing CMY often produces a muddy brown rather than true black.

RGB (Additive Color Model):

Used for screens and digital displays, RGB works by adding light. When you mix all RGB colors at maximum intensity, you get white. This is why it's called an "additive" model - you're adding light together.

Conversion Process

1

Normalize CMYK values: Convert percentage values (0-100%) to decimal values (0.0-1.0) by dividing by 100.

2

Apply conversion formula: Calculate RGB values using the formula:

R = 255 × (1 - C) × (1 - K)

G = 255 × (1 - M) × (1 - K)

B = 255 × (1 - Y) × (1 - K)

3

Round and convert: Round RGB values to nearest integers (0-255) and convert to HEX by converting each component to hexadecimal.

Common Conversion Examples

CMYK Values RGB Values HEX Code Color Name
C:0%, M:100%, Y:100%, K:0% R:255, G:0, B:0 #FF0000 Red
C:100%, M:0%, Y:100%, K:0% R:0, G:255, B:0 #00FF00 Green
C:100%, M:100%, Y:0%, K:0% R:0, G:0, B:255 #0000FF Blue
C:0%, M:0%, Y:0%, K:100% R:0, G:0, B:0 #000000 Black
C:0%, M:0%, Y:0%, K:0% R:255, G:255, B:255 #FFFFFF White
C:0%, M:100%, Y:100%, K:10% R:230, G:0, B:0 #E60000 Bright Red
C:100%, M:0%, Y:100%, K:20% R:0, G:204, B:0 #00CC00 Bright Green
C:50%, M:0%, Y:100%, K:0% R:128, G:255, B:0 #80FF00 Chartreuse

Applications and Use Cases

  • Print Design: Preparing print materials with accurate color reproduction
  • Web Design: Converting print colors to web-safe colors
  • Brand Consistency: Maintaining consistent colors across print and digital media
  • Photo Editing: Converting images between color spaces for different outputs
  • Product Design: Ensuring product colors match between physical and digital representations

Why Conversion Matters:

  • CMYK has a smaller color gamut than RGB, so some RGB colors cannot be reproduced in print
  • Black (K) in CMYK creates richer, deeper blacks than mixing CMY
  • RGB colors often appear brighter and more vibrant on screens than when printed
  • Professional designers always convert between color spaces for accurate reproduction

Frequently Asked Questions

Printed colors (CMYK) use reflected light and have a more limited color gamut than screen colors (RGB) which emit light. Some bright, vibrant RGB colors cannot be reproduced accurately with CMYK inks. Additionally, different printers, papers, and screens can affect color appearance.

The "K" in CMYK stands for "Key" or "Key plate," which traditionally refers to the black printing plate. Black ink is used separately because mixing cyan, magenta, and yellow inks typically produces a dark brown rather than a true black. Using black ink also saves colored ink and produces richer dark tones.

No, not all RGB colors can be accurately converted to CMYK. The RGB color space has a wider gamut (range of colors) than CMYK, especially in bright greens, blues, and cyans. When converting from RGB to CMYK, these out-of-gamut colors are mapped to the closest reproducible CMYK color, which may appear duller or different.

Web-safe colors are a palette of 216 colors that display consistently across different browsers and operating systems. While less critical today with modern displays, they were important in the early web when many computers could only display 256 colors. Web-safe colors are represented by HEX values with combinations of 00, 33, 66, 99, CC, and FF for each RGB component.

This calculator uses standard conversion formulas that are widely accepted in the design industry. However, actual color reproduction depends on many factors including specific printer profiles, paper type, monitor calibration, and lighting conditions. For professional work, it's recommended to use calibrated monitors and printer-specific color profiles.