Which attribute of color does "Value" measure in the HSV color model?

In the HSV color model, "Value" specifically measures brightness or luminance. This attribute indicates how light or dark a color appears, regardless of its hue or saturation. A higher value means the color appears brighter, while a lower value reflects a darker appearance. This aspect of color is critical in various applications, including digital art and design, as it directly influences how colors are perceived in different lighting conditions.

While "Chroma" relates to the intensity or purity of a color, and "Tone" refers to the combination of hue, value, and saturation to create variations, neither of those captures the essence of what "Value" represents. Similarly, "Temperature" refers to the perceived warmth or coolness of a color, which is another dimension entirely. Thus, in the context of the HSV color model, the attribute of color that "Value" measures is indeed brightness or luminance.