The lines or other marks used to fill in outlines of a sketch, engraving, or painting to represent gradation of color or darkness

The engraving or drawing of fine lines in close proximity especially to give an effect of shading

Which uses fine parallel line drawn closely together to create the illusion of shade or texture in a drawing

Is a dark area where light from a light source is blocked by an opaque object.

Colors are in the middle of tonal spectrum, neither dark nor light.

An area or a spot in a drawing, painting, or photograph that is strongly illuminated.

A scale showing a gradual change from the lightest value white to the darkest value black.

Defines how light or dark are given color or hue can be