The suit is a fundamental of the business look, preferably in blue or dark gray colour, worn with a long sleeve shirt and buttoned cuffs, and a tie. Shoes, strictly of the same colour of the belt, are usually brown or black in office, and socks have to be the same colour of the trousers. Also details are important, such as a pocket square or a watch, since they make evidente the time and effort spent for the details and reflect to others a message of an attentive person.
Sober and solid colours are very practical and easy to match, but a good wardrobe for your daily work should be varied. Then add patterns and embellished fabrics. Striped and checked shirts both enhance your work look, provided that they have little size. In this case, the pattern of the tie should be different and of a different dimension.