“Pick a color” means two different things in Chrome.
Sometimes you need the exact pixel inside the current tab. Sometimes you need a color from Chrome settings, the Web Store, or another app. An extension cannot use one technique for both.
Best Color Picker has Page mode for the first job. It captures the visible tab only after you start it, then puts a temporary sampling lens over the screenshot. The lens goes from 4× to 64×, with a pixel grid for tiny icons, sharp edges, and anti-aliased text. The screenshot stays in memory while the picker is open. It is not saved or sent anywhere.
Anywhere mode uses Chrome’s native EyeDropper when it is available. It reaches visible pixels beyond the webpage, including protected Chrome pages and the desktop. You lose the custom lens, but you can pick from places an extension content script cannot reach.
Afterward, copy the color as HEX, RGB, HSL, HSV, HWB, OKLab, OKLCH, approximate CMYK, or a CSS variable. The last 100 picks stay on the device.
The extension asks for page access when you start Page mode. It does not sit on every site waiting for something to sample.