(See Classical Painting Stage One post for the first step!)
After the underpainting is done as a full value careful study (raw umber works really well), it’s time to add colour. Matching the values of the underpainting, hues are painted over by “tiling” paint on in small dabs with a round brush. Then, different values are blended by “tapping” with a filbert brush at the edge of each change in value. Before starting an area, make sure that you paint in local colour around the object so that you can judge values more easily. Even though the paint is considered opaque, the underpainting still comes through. Adding colour without the underpainting would yield disastrous results! Once this layer of colour is dry, another layer can be painted over, which will further refine detail and add depth to the colour.