I also recently read this post from LPC at Privilege on dressing for academia. And while scientists (and biologists in particular) tend to be more informal, I did get several good ideas. Namely, I should focus on basic dark colors to mix and match.
So out with the old and in with the new. (notice a pattern here? everything is purple/fuchsia)
I also rounded up some pastels (LPC says no to these and I realized there was a reason I hadn't been wearing them) and some shoes that I no longer wear to donate.
Add in a few button downs and a blazer or two (like this charcoal linen one) and hopefully no one will mistake me for a student (its only happened once so far).