Styling a mens blazer jackets for both formal and casual occasions requires attention to certain key elements. Here are some tips to achieve a versatile look: Formal Occasions: Pair your blazer with matching suit trousers in a complementary color. Opt for classic colors like navy, charcoal gray, or black. Choose a crisp dress shirt in a solid color or subtle pattern. White or light blue are safe and versatile options. Add a tie for a polished and formal touch. Opt for a silk tie in a complementary color or pattern. Casual Occasions: Pair your blazer with well-fitted dark jeans or chinos. opt for a slim or tailored fit for a modern and casual look. Choose a casual shirt such as a button-down Oxford shirt, a chambray shirt, or a patterned shirt in a relaxed fabric. Leave the tie behind for a more laid-back feel.