2 Slabbed SBA Errors

The errors of this denomination are by far more interesting for me than any of the non-errors.

Below is an MS64 1979-S Copper Wash and an MS65 1999-P Off-Center, both PCGS.

 

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Can we see the labels for your SBA's?

I only have these 2 -

 

99 wide rim

 

I wasn't sure about the meaning of the copper wash. And then I saw this:
Called sintered or copper washed planchet error coins, these errors occur when coin blanks are left for an extended period in the annealing furnace. This give time for the dust of previous coins to settle on the blanks, causing a darker appearance.
But why would that make it look like a copper color?
On the off center (a beauty) is that the natural color of the coin? It has a very gold appearance, and those coins are usually a silvery color.

 

It just looks a little more gold than silver because of the lighting in my spare room.