Handy colors (chrome extension)
Upload folder with the extension on page
chrome://extensions/ using button "Load unpacked extension".
This extension is not in the Crome Web Store, this repository is a source code of the extension.
You can not only download and use it, you can more: modify the code as you need, remove needless palettes and add your favorites.
Palette on page:
Handy colors page: https://yoksel.github.io/handy-colors/