HSV (Hue, Saturation, Value) is a color model used in various applications such as image processing and computer graphics. It represents colors based on their hue (the color itself), saturation (the purity of the color), and value (the lightness or darkness). In this model, hues are represented by angles (typically from 0 to 360 degrees), saturation and value range from 0 to 1 or 0 to 100%.