I was wondering the same thing, which is why I landed here. Then I noticed that the color # is highlighed in the box. so I tried copy/paste. It works! Copy color # from one object, then paste the same # to other object(s).

I was wondering the same thing, which is why I landed here. Then I noticed that the color # is highlighted in the box, so I tried copy/paste and found that it works. Copy color # in the picker from one object, then choose the desired object and double-click its fill-color box and then paste the # into the blue-highlighted color # box.