Can anybody confirm that the IIc and IIc+ are different colors?
There were three colors in use at Apple at the time. I think 4, really, but for the sake of clarity we'll say three: beige, "Fog" and platinum. "Fog" was used on the IIc, ImageWriter II and LaserWriter. Beige was used on the the earlier Apple II line and the early Macs. The IIgs was the first to use the platinum color and the Plus, the IIe and the IIc had different colors prior to the IIgs.
We know that the Plus was changed to Platinum as well as the IIe enhanced before their production run ended. The question is really then, did the IIc change to platinum before it was replaced by the IIc+ AND/OR did the IIc+ change to platinum with its introduction or continue the original "Fog" case color?