Color Picker

The classic picker: choose which channel drives the slider — hue, saturation, brightness, any RGB channel or any CIELAB axis — and the square shows the other two. Tip: press on a letter such as H: and drag left or right to change that number without typing. Changes here apply straight away; the foreground chip at the top right opens a quick picker with OK / Cancel on any page. Theory: HSL and HSV →