tone the specific shade of dark or light value the gradation of tone from light to dark, from white through grey to black value scale a specific measured range from white to black
descriptive value the range of tones in a drawing or design that accurately represent what is seen arbitrary value value that does not necessarily conform to the actual appearance of an object; the use of tone based on intuitive responses or compositional needs expressive value value that is expressive or subjective in nature, often created by the expressive use of a specific media decorative value flat patterns of tones creating a value scale
modeling the change from light to dark across a surface; a technique for creating spatial illusion plastic in drawing or design, the illusion of 3-dimensions in a shape or mass chiaroscuro modeling, the gradual blending of light or dark to create a 3-D illusion sfumato a very smooth modeled value scale that resembles smoke
tenebrism extreme exaggerations of light/ dark contrasts
highlight area receiving the greatest amount of light
shading dark area caused by lack of light or illumination
cast shadow shape of an object intercepting the light area of a background or surface