Chromaticity

File:Chromaticity Diagram RGB.svg

Chromaticity Diagram RGB

File:Chromaticity Diagram RGB.svg

Chromaticity Diagram RGB

PlanckianLocus

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3D Chromaticity Diagram WideGamutRGB

CIE 1976 UCS

Chromaticity is an objective specification of the quality of a color regardless of its luminance. Chromaticity is a two-dimensional representation of color, which is defined by its hue and saturation. It is often used in various fields such as color science, digital imaging, and color printing.

Definition

Chromaticity is typically represented in a chromaticity diagram, which is a graphical representation of colors. The most common chromaticity diagram is the CIE 1931 chromaticity diagram, which was developed by the International Commission on Illumination (CIE). In this diagram, colors are represented by their x, y chromaticity coordinates.

Chromaticity Coordinates

Chromaticity coordinates are a set of values that define a color's hue and saturation. These coordinates are derived from the tristimulus values of a color, which are the amounts of three primary colors needed to match the color. The most commonly used chromaticity coordinates are the CIE 1931 x, y coordinates.

Chromaticity Diagram

The chromaticity diagram is a two-dimensional plot that shows the chromaticity coordinates of colors. The diagram includes a horseshoe-shaped curve known as the spectral locus, which represents the chromaticities of pure spectral colors. The area inside the spectral locus represents the chromaticities of all possible colors.

Applications

Chromaticity is used in various applications, including:

• Color calibration: Ensuring that colors are accurately represented on different devices.
• Color matching: Matching colors in different materials or lighting conditions.
• Colorimetry: The science of measuring and describing color.

Related Concepts

• Color space
• Color temperature
• Color vision
• Metamerism

See Also

• CIE 1931 color space
• Color science
• Colorimetry
• Tristimulus values
• Spectral locus