When I have an element selected, it would be great to apply one of my global colors to it with a keyboard shortcut. XD could give all my global colors a number from top to bottom and then I could reference it with ⌘⇧1 , ⌘⇧2 ... (just an example). In that case I can sort my global colors in the order I use them most and the shortcut automatically references the respective color. Optionally pressing ⌥ could change the border color.

This would save me a lot of mouse movement and time.

Thanks