FEA Color

Sample any pixel on screen with the EyeDropper API, or type a hex. Each colour comes back with its RGB and HSL, the WCAG contrast of black and white text on it, a nine-step tint/shade ramp, and five harmony schemes. Export the set as CSS custom properties, JSON, or a plain list.

The colour maths is the extension's popup script verbatim — the same conversions, the same WCAG grading. The ramps and harmony schemes are new here, where there's room for them.