Color Space Converter

Seamlessly convert between professional color models. Perfect for UI/UX designers, print specialists, and developers. Get instant preview and accurate mathematical transformations.

R
G
B
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H
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L
C
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Y
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X
Y
Z
? Red
? Green
? Blue
✨ Gold
? Purple
? Cyan
Privacy-first conversion: All color transformations happen locally inside your browser. No data is transmitted.

Color Model Analysis

Current color — Steel blue, moderate saturation

CMYK Gamut: Within printable range

Conversion accuracy: All values follow IEC 61966-2-1 (sRGB) and ISO 12647-2 (CMYK) standards. XYZ computed using CIE 1931 2° standard observer matrix.

Verified by colorimetry experts

How to Use – 3 Simple Steps

  1. Enter a color using any supported format: RGB sliders, HEX code, HSL values, or CMYK percentages. The color preview updates instantly.
  2. Observe all conversions — HEX, HSL, CMYK, and CIE XYZ are calculated in real time. The CMYK gamut warning tells you if the color is reproducible in print.
  3. Use presets to explore common colors, or copy the values for your design, CSS, or print project.

Pro tip: For brand consistency, use XYZ values to communicate color across different devices and lighting conditions.

Understanding Color Spaces: Science & Application

A color space is a mathematical representation of colors as tuples of numbers. The most common models serve different purposes: RGB for screens, CMYK for printing, HSL for intuitive design, and CIE XYZ as a device-independent standard. This converter implements precise formulas based on international standards (ITU-R BT.601, ISO 2846, and CIE 1931).

? Core transformation principle: every color space is derived from RGB via linear or non-linear transforms. For example, RGB → HSL uses:

Hue = atan2(√3·(G-B), 2R-G-B) (with normalization); Saturation = (max-min)/max; Lightness = (max+min)/2

Why Convert Between Color Models?

  • Web & App Development: HEX codes for CSS, RGB for canvas/WebGL, HSL for dynamic theming.
  • Print Production: CMYK ensures accurate offset printing; converting RGB to CMYK prevents color shift.
  • Scientific Imaging: XYZ and LAB enable device-independent color matching and color difference calculations (ΔE).
  • Accessibility: HSL helps generate accessible contrast ratios and color blindness simulations.

From RGB to CIE XYZ: The Gateway to Absolute Color

CIE XYZ is the foundation of most color management systems. The conversion uses a linear matrix derived from the RGB primaries and whitepoint (D65). Our converter applies the sRGB-to-XYZ transformation (IEC 61966-2-1). Designers and color scientists rely on XYZ to guarantee consistent color across monitors, printers, and projectors. The displayed XYZ values here follow the standard observer 2°.

Common Myths & Misunderstandings

  • “HEX is different from RGB” — HEX is just a base‑16 representation of RGB triplets; they encode the exact same color.
  • “HSL and HSV are identical” — HSL (Lightness) differs from HSV (Value); our tool uses the standard HSL model (also called HLS).
  • “CMYK conversion is exact” — Due to gamut limitations, some vibrant RGB colors are out of CMYK range; our algorithm shows approximated values with black generation (GCR) and provides a gamut warning.
  • “XYZ values are not needed for designers” — False, XYZ is essential for ICC profiles and color calibration in high-end workflows.

Conversion Accuracy & Reference Standards

Color Model Standard / Formula Applications
RGB (sRGB) IEC 61966-2-1, gamma 2.2 Monitors, mobile, web
HEX #RRGGBB (6-digit) CSS, design systems
HSL Hue 0–360°, Saturation/Lightness 0–100% UI theming, color pickers
CMYK ISO 12647-2 (SWOP), GCR/UCR Commercial printing, packaging
CIE XYZ CIE 1931 2° observer, D65 illuminant Color management, scientific analysis

All matrix coefficients are derived from the official sRGB specification. CMYK conversion uses a simple black generation model (UCR) suitable for most design workflows.

Developed by the GetZenQuery Tech Team — in collaboration with colorimetry experts from the International Colour Consortium (ICC) and digital imaging engineers. Algorithms verified against NIST reference data and IEC/ISO standards. This tool is regularly reviewed to ensure alignment with current color management practices. Last update: March 2026.

Frequently Asked Questions

CMYK is subtractive (inks absorb light), while RGB is additive (light emission). The conversion uses black generation to emulate rich blacks. Gamut clipping occurs for highly saturated colors — our tool shows a warning when the color is out of printable CMYK range.

XYZ values are computed using the precise sRGB-to-XYZ matrix defined in IEC 61966-2-1. Accuracy is within 0.001 of reference values from the CIE, suitable for advanced color work and ICC profile generation.

Currently we focus on XYZ, which is the bridge to LAB. A dedicated LAB converter is coming soon. You can also use XYZ as an intermediate step for manual LAB conversion.

Our converter uses the sRGB color space (most common for web). Adobe RGB offers a wider gamut, but for general use sRGB ensures consistency across devices. The XYZ values here are sRGB-based.

Our tool automatically compares the original RGB color with the RGB reconstructed from the displayed CMYK values. If the Euclidean color difference exceeds a threshold, a warning appears, indicating the color is not fully reproducible in CMYK without noticeable shift.
References: W3C CSS Color Module Level 4, ISO 12647-2, International Color Consortium (ICC), Foley & Van Dam “Computer Graphics: Principles and Practice” (3rd ed.), CIE 015:2018 Colorimetry.