Final answer:
A light value of color created by adding white is known as a tint. Tints are lighter and often pastel, while adding black creates a darker shade. Saturation is the purity of a color, which decreases when white or black is added.
Step-by-step explanation:
The relatively light value of a color produced by adding white to it is called a tint. When you add white to a base hue, the result is a lighter version often described as pastel. In contrast, adding black to a color creates a shade, which makes it darker. The term value in art refers to the lightness or darkness of a color, changed by adding either white or black, giving an artist the ability to create variations for shading or highlighting.
Saturation describes the intensity and purity of a color, with primary colors being the most saturated. When colors are mixed or when white or black is added, saturation decreases, resulting in tints or shades, and the color may appear more washed out or muted.