Analogous is a primary color and the secondary colors on both sides of it on the color wheel untill you reach the next primary color. Only use one primary color. To balance out the piece use the complementary color on the other side opposite to the primary color. This will unify your color in your piece. Example; Blue, Blue Violet, Violet, Blue Green, Green-Analogous. Combine it with the Complementray color to Blue-Orange. Don't use any other colors and see what happens.

Sfumato- is a technique were you use the shapes of shadows, cast & form, to define the person instead of lines. Try to not use any lines when you draw a person and make sure you only use one light source.