ColorSnapper lives in the menu bar, and can be activated by using 2 keyboard shortcuts. One shortcut opens the color sampler, where you can click on a color on the screen (and hold down the mouse to get some extra zoom and accuracy) to instantly copy it to your keyboard. The other shortcut opens up a window that allows you to see previously sampled colors, where you can edit a sampled color with Apple’s color picker or copy a color to your clipboard in pretty much any color format you can think of. You can also save favorite colors (and access them from the menu bar by holding the alt key)
My favorite part is that, for everything that you can do with this app, there’s a matching keyboard command. While using a mouse is completely fine, I can do things much faster when I can have my fingers on the keys. With this app, I can very quickly make a collection of colors. There are other apps that are similar to this, but the workflow of ColorSnapper is the best and most refined I’ve come across.
There’s a preview of this app available on the website for this app, and I’d highly recommend trying it out.