Multi-edit is a great way to change the color of many components at once. What is not great is the need to very carefully multi-select the full set of components to change. It's slow and tedious and repetitive.

I propose a function to "select all components of the same color". This ignores opacity, it just pays attention to RGB. It should be a contextual menu item and also under the Edit menu, I think.

This way if I want to change all the white components to black, I just right-click on one of them, choose "select all components of same color", and it's done. Then I go in and change the color.

This would be a very nice convenience when editing appearance, and would be a perfect companion to component mult-edit.