I have a pair of brown brogues which are frequently mistaken for mens when I'm not wearing them. Like, if I'm in my house and my Dad visits and then I go to put my slippers on, he says "oh I thought those were mine", as he has a really similar pair. But I also get loads of compliments on them when I wear them, even on the MN S&B page I'll have you know
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So, I bet the shoes are fine.
If your hair is tidy enough, (by which I do not mean straightened and styled to death, just not falling into your eyes), your shirt is tucked in and everything is clean and ironed, I have no idea what the hell they are on about.
I've worked in some really corporate offices in London and around it and I also used to live in Paris.
While a lot of women in offices dress in matchy matchy LK Bennett dresses, with matching jackets, shiny ballet pumps or spindly heels, hair long, long, long and straightened to death, regardless of age, body type, personality etc, it absolutely is not essential to be another cardboard cutout and forcing that look, as some people seem to, actually ends up looking a bit try hard and uncool. Different if that's your natural style, I hasten to add. Some people are naturally like that and it shows when they wear what genuinely suits them.
The most stylish people I see out and about now, as well as in my various offices, when I was still working, always dress to please themselves, within reason. Just like you do. And understated clothes often look a lot cooler and more chic than wearing heels and matchy matchy workwear.
So, in summary, YANBU and you sound cool 😎.