A backlight assembly includes an optical member, a light source module, a light-mixing member and a container. The optical member has a plate-like shape. The light source module provides a color light to the optical member. The light-mixing member is arranged between the optical member and the light source module. The container includes a bottom surface having a recess that receives the light source module, and a sidewall extending from an edge of the bottom surface. The sidewall includes a first supporting portion supporting the optical member, and a second supporting portion supporting the light-mixing member.