A monochrome outfit at its finest; it looks like one piece, but upon closer inspection, you can see the subtle color difference between the top (with cuffed sleeves!) and the skirt, which is pulled together beautifully by that simple belt.
And this is how I would like to dress if I ever get an office job. She takes the classic (but boring) button-up and A-line skirt combo and amps it up, which is a typical Bond way of dealing with things. Cuffed sleeves once again, and the thin black lines on the neckline and pockets work quite nicely with the deep mustard of the skirt, a color which, in my opinion, hardly ever is pulled off this well.
And in the fateful moment when she takes her seat outside M's office, a pale, sky-blue shift dress with subtle, yet strategic origami folds fits the playfulness of her personality as well as the office appropriateness of working in a government agency. Well done, Ms. Moneypenny, well done.
(photos collected from googleimages)