Custom colours - The ability to save them.

I guess this suggestion didn't get much support, but I've been finding this a much-needed missing feature in the program for quite a while now. Here is how I envision it to look:



The current color picker would simply be expanded to include a palette of colors. They could be pre-populated with some primary colors on the left half, and the ones toward the right side would be left empty/white.. As you work with a specific render, instead of having to constantly copy-paste the RGB values for the same colors over and over, you would be able to just drag the current color from the selection at the top, onto any of the boxes on the bottom. Essentially, the boxes at the bottom would be re-useable and over-writeable.

The eyedropper on the right side would be used to capture any color from the current render or perhaps the entire desktop, and it could then be dragged from the top to one of the palette boxes below as well.