Neolamprologus pectoralis Callihan Sofa Set. Transitional style is a marriage of traditional and contemporary furniture, finishes, materials and fabrics equating to a classic, timeless design. Furniture lines are simple yet sophisticated, featuring either straight lines or rounded profiles. The transitional style is one of the most popular styles used to decorate homes. It incorporates design elements from a variety of centuries, which allows homeowners to feel comfortable and elegant at the same time. The transitional style features warm, rich colors that are very inviting.