What aspect of color determines its intensity in a cosmetic product?

Saturation is the aspect of color that determines its intensity and purity in a cosmetic product. High saturation means that the color is vivid and rich, without any dilution or mixing with gray. This results in the color appearing more striking and bold. Conversely, low saturation implies that the color has been muted or mixed, which can result in a softer and less impactful appearance.

In the context of cosmetics, understanding saturation helps in creating looks that can either be natural and understated or vibrant and attention-grabbing, depending on the desired effect. For example, a highly saturated lipstick shade will stand out more than a less saturated version of the same color.

The other choices relate to different characteristics of color: value refers to the lightness or darkness of a color; hue describes the actual color itself (like red, blue, or green); and temperature refers to the warmth or coolness of a color, which affects mood and perception but not its intensity directly.