Which property of paint determines its brightness level?

The property of paint that determines its brightness level is lightness. Lightness refers to the perception of how bright or dark a color appears. It is a key aspect of color that affects the overall aesthetic and visual impact of the paint. Colors that are classified as lighter will reflect more light and appear brighter, while darker colors absorb more light and thus have a lower lightness value.

Hue refers to the color’s name (like red, blue, or green), saturation indicates the intensity or purity of a color, and adhesion relates to how well the paint sticks to surfaces. While hue and saturation can influence the overall perception of color, it is lightness that specifically denotes the brightness level, making it the correct choice for this question. Understanding lightness is crucial in paint technology because it affects both the application and the final visual outcome of the paint on different surfaces.