The trick is to go with a slimmer cut that isn't too skinny, and, for the most part, stick with a darker wash, like a black ... way, a navy blazer is the ultimate business casual stalwart.

They combine it with complementary and accent shades—from red and pink to beige and black. In fact, all the colors go with navy blue ... midiskirt for a more casual vibe.

Here are three outfits to remind you how to wear black and navy at the same time, and why it’s a secret weapon not to be ignored or pushed aside. For Your Increasingly Casual Office You have a ...