I seem to recall people getting all upset over Stirling castle too when it was restored to its original color (a nice buttercream yellow). It was quite a change from the somber grey of the exposed stone, I’ll grant. It didn’t loom quite so severely over the country side.
What do you suppose people would make of a classical marble edifice, the Parthenon say, if it was repainted in its original colors? Best guess on those is something a bit, shall we say, screamingly garish….