How to copy the display color from one object to another?

[encephalon]

but i would also like to have a pipette to work, or better to drag and drop the colours, i stated a wish here

Wish: Drag and Drop Colors within the Layer Panel

often do i want the print color to be the same, not a problem i just print the display color, but when i activate the print preview it obviously will not work. so i have that extra work to change the colours constantly. drag and dropping colors to different layers would also generally be helpful i think. or is there a way i am not aware of?