Today's 37 piece capsule combination is one of my favorite ways to style monochromatic separates. By pairing like colors together, you not only up the chic factor of any look, but also create the perfect base for accessories.
In the case of this look, the navy sweater and pats perfectly compliment the rich brown accessories for a look thats equal parts laid back and put-together. Plus, both the sweater and trousers are comfortable enough for a long workday, but still professional enough that it doesn't look like you've given up.
Also, if the loafers are too casual for your work environment, you could easily swap in ballet flats or simple pumps.