<em>Tint </em>refers to a a shade or variety of color which is created by being added white. As a result, the color obtained has a paler variety than the original one.
The rest of the options are incorrect because <em>depth </em>indicates that the color is darker and stronger; <em>shade </em>involves the type or degree of a color; while <em>tone </em>refers to the degree or quality of brightness, deepness or hue of a tint or shade of a color.
