I use Google Drawings quite a bit for amateur graphic design and have found it quite capable; however, one aspect I find missing in Google Drawings is a color picker eyedropper. As a result, what I did was install a Chromium based browser extension (that will work on Chrome, Edge, Vivaldi, etc..) that gets the job done, called ColorPick Eyedropper.
ColorPick Eyedropper is described as a zoomed eyedropper & color chooser tool that allows you to select color values from web pages and more. If you do any type of graphic design on the computer you already know what this type of tool does. One thing to point out is that the tool is FREE; but, after saving 50 color choices, it may prompt you to contribute. You can get around that by clearing the history. Overall, excellent job by the developer on this tool and has met my needs when working in Google Drawings.