Here the sequins both lighten the overall color palette and add texture to the look.
A navy skirt instead of black is also very important for keeping the look from being too dressy or evening-ish.
The tailored overcoat gives just a touch of menswear and the metallic gold color of the shoes is a perfectly unexpected way to finish off an outfit.
This is exactly the type of inspirational look that I hope people visit The Sartorialist for – it is not about the designers of the individual pieces or the price of any of her pieces but the abstract idea of how she has mixed color, texture, day/evening. masculine/femme.