ColorZilla is a color-picker and eyedropper extension available for both Chrome and Firefox, built for grabbing exact colors and generating CSS gradients from anything rendered in the browser.
It samples the literal on-screen pixel - including colors baked into images, overlays, or gradients with opacity applied - and hands you the hex/RGBA instantly, which is more reliable than hunting through devtools for the CSS rule that produced that pixel in the first place.
Use it when a client sends a screenshot with a brand color you need to match exactly, a competitor's live page has a color worth stealing for a moodboard, or you're reverse-engineering a gradient without asking anyone for the source file.
It runs with "read and change all your data on all websites" permission so it can sample pixels anywhere - standard for this category of tool, but worth knowing before you install it.
Browser extension for color-related tasks — basic and advanced color picking for designers.
