What term describes the lightness or darkness of a hue?

The term that describes the lightness or darkness of a hue is known as "value." In the context of color theory, value refers to how light or dark a color appears, which is determined by the amount of light reflected by the color. A color with a high value is lighter, while a color with a low value is darker. This distinction is crucial in floral design as it helps designers create contrast and depth in their arrangements.

While intensity refers to the purity or vividness of a color, it does not measure lightness or darkness. Tone typically refers to a variation of a color made by adding gray, while shade refers specifically to a darker version of a color created by adding black. Therefore, value is the most accurate term for describing the lightness or darkness of a hue, making it the correct answer in this context.