How to copy vertex colors? I duplicated an object with ShiftD several times, then painted some vertex colors on one of the duplicates.

Unfortunately, I think I did this sort of backwards as I can't find a way to copy vertex colors from one object to another.

Is there any way to copy the vertex colors from one object to another identical object?
Vertex colors are object data, so can be copied/linked with CtrlL>Object Data.

This will copy/link all the object data (including mesh data) of the active object to the selected object(s). Doing this after duplicating with ShiftD is the same as duplicating with AltD.