Theme Color Picker

Can we get an Undo function (Ctrl Z) in the theme editor?

For example, if I want to tweak a theme and color1 isn't in the recents, and I change it to color2 but decide I want to go back to color1, it is very difficult to match the same color unless I have the hex code copied, memorized the value, or I cancel the edits (frustrating after changing multiple colors)