Which of the following words describe a shade?

A shade is defined as a color that has had black added to it, which makes the color darker. This alteration deepens the original hue, resulting in a more subdued tone. For example, adding black to blue creates a darker blue, often referred to as navy.

The other options relate to different color manipulations: mixing a color with white creates a tint, which lightens the original hue; combining it with gray results in a tone, which can modify the color by making it less vibrant; and adding yellow changes the color's hue altogether rather than creating a shade. Each of these processes affects the original color in a unique way, but only the addition of black specifically creates a shade.