The HSL color model describes a color by using the three color components hue (H), saturation (S) and luminance (L). This color format is very popular for designing and editing (e.g. within graphics design tools) because it gives the user a good impression about the resulting color for a certain color value: Hue defines the pure color tone out of the color spectrum, saturation defines the mixture of the color tone with gray and finally luminance defines the lightness of the resulting color.