If your office is business casual, but with leniency–try swapping a plaid shirt in place of your typical cardigan or plain button down.
Shirt: Urban Outfitters (Similar)
Skirt: J.Crew (Similar)
Shoes: G.H. Bass
Here I wore a plaid shirt in teal and purple that complemented my teal skirt. I kept things simple with black tights and black loafers. It’s such an easy trick and a great way to update your work or professional outfits.