I love navy and black together. In this set below I added a pop of ruby in the necklace and a stripe pattern in the top. This is everyday chic. Add a pop of red on the lips to bring out the ruby necklace.
Alexander Wang cashmere Sweater (great deal on the outnet)
LNA tank (another deal)
Ela Rae ruby long necklace
Givenchy pandora (love this one)
Frame denim
Saint Laurent boots