Unless you’re wearing a kilt and playing the bagpipes, participating in the Highland Games, or are otherwise actively Scottish, you risk invoking a slight schoolgirl connotation when wearing plaid in skirt form. This is not necessarily a bad thing, however, as plaid is also professional and entirely work-wear appropriate. Plaids involving red risks being too traditional, or too lumberjacky, but purple plaid is appealingly modern. You will be perceived as conservative yet kicky, which is the right balance to strike whether you’re in staff meetings, in your cubicle, or plotting revenge against those who’ve wronged you.