I've always thought "San would look fab in the purple shirt" too, and I still think so, but like Marianne, I'm wondering if the colour is closer to reality in the outside or inside photo (like you I prefer it darker).
That blue looks terrific on you too. I don't know, I can't pick;-)
AND, I think this type of blouse is made for you San! It is a statement, that's true, so it looks great as is (with skinnies and leggings). Maybe add a necklace too yes.
I can also see it with a waistcoat, buttoned and unbuttoned. And with a fitted blazer (unbuttoned, see Angie's blog post this week too). How do you feel about trying that?
Or with a fitted denim jacket + leggings? Or maybe a low-slung belt?