A colour and everything around it
Pick a colour from the spectrum and this tool shows its HEX, RGB and HSL codes, plus a spread of tints and shades derived from it. That range is what you actually need in practice — a base colour rarely travels alone, it comes with the lighter and darker steps for states and surfaces.
Click to copy, all local
Every code and every shade copies with a click, and none of it leaves your device. It is a fast way to lift a whole mini-scale from a single colour choice.