Film lighting and color can be used to create different moods and effects. The temperature of light can vary from cool blues and grays for somber scenes to warm pinks and golds for romantic scenes. Cinematographers use filters and digital manipulation to adjust colors. Whole films are sometimes desaturated in post-production to achieve a particular look, as with O Brother, Where Art Thou? which was given an old, dusty look. Spot lighting, backlighting, and directional light can also create dramatic effects and silhouettes that impact the audience. Occasionally black and white is used instead of color for specific artistic reasons.