The hue, must be a number between 0 and 360 inclusive.
The saturation, must be a number between 0 and 100 inclusive.
The lightness, must be a number between 0 and 100 inclusive, 0 will make it black, 100 will make it white
The alpha value, must be a number between 0 and 1 inclusive.
Utility to format a HSLA set of values into a string.
See
https://en.wikipedia.org/wiki/HSL_and_HSV
Example