Palette color choices vary greatly. Just as there are thousands of skin tones and variances, so are there many possible color combinations used in portraiture. Complementary tones are used to bring depth and vibrancy to the tones. Lights and expressive darks are used to give drama and depth to the subject. Shades that are not normally associated with flesh tones, colors not natural to actual skin, can be dramatic.
Textures can play a vital part in portrait work.
One simple method to achieve textural interest is to choose a paper such as heavily textured watercolor paper where automatic texture is guaranteed. Other textures can be applied to a surface where textural interest is desired. Once dry, this surface can be reworked with additional pastel. The resulting surface often looks more like oil than pastel and is especially good for the softness desired in portraiture. Although Degas' exact method is unknown, a small travel iron or travel steamer can be used for this technique.