Random Colour Generator

In short Truly random colours — a random value for red, green and blue — are almost never what anyone wants. They produce muddy browns and greys far more often than anything usable, because most of the RGB cube is unsaturated sludge and only a thin shell of it holds the vivid colours people picture when they say random. That is why this generator constrains the parts that matter. Fix saturation and lightness and randomise only the hue, and every colour that comes out is a usable member of the same family: same energy, same weight on the page, different colour. That single change is the difference between noise and a palette. It is also how you generate colours for a chart with an unknown number of series, or avatar backgrounds, or tags — pick evenly spaced hues at one saturation and lightness rather than rolling the dice for each. Two practical notes. Random colours are not distinguishable for everyone, so check the set against colour blindness before using it for anything meaningful. And if you need repeatability — the same user always getting the same colour — you want a hash of their name, not a random value.