Too funny!! They definitely dressed in her in true '70s colors. And I suppose the only reason we didn't see her dressed in some variation of Harvest Gold was because with her blonde hair she might have disappeared on screen!! But two out of the '70s triumvirate isn't bad!!
The mind boggles at the horror THAT would have been - and for all the wrong reasons. And given that, a slightly wrong depiction of one of the actors here and there seems like a minor issue.