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The XYZ color space, established by the CIE (International Commission on Illumination) in 1931, is the foundational model for all modern color management systems. It mathematically defines the relationship between the physical wavelengths of light and human color vision. In this model, 'Y' corresponds to luminance (brightness), while 'X' and 'Z' serve as virtual components to describe chromaticity. Because it encompasses all colors visible to the human eye, XYZ serves as the standard reference space for converting colors between different devices and color spaces.
HSVA color code, an extension of the HSV color model, introduces an Alpha channel, resulting in Hue, Saturation, Value, and Alpha.
HSVA color codes are valuable in web design, graphic design, and digital art, enabling precise specification of colors with varying levels of transparency. This extension enhances control over the visual aspects and layering of elements in digital creations.