What is tonality in tonal underpainting?

Tonality in tonal underpainting refers to the technique of using just one color to establish a range of tones and values that will serve as the foundation for the painting. This monochromatic approach allows artists to focus on light and shadow, creating a structured base that can enhance the composition's depth and dimensionality.

By starting with a single color, artists can effectively map out the important tonal relationships in their work, making it easier to layer additional colors and maintain consistency in mood and atmosphere throughout the painting process. This method promotes a strong understanding of contrasts and highlights, which are essential for achieving realism and impact in visual art. The technique can be particularly useful in genres such as portraiture and landscape, where light plays a crucial role in defining form.