Hierarchy classification:

1. top of the aat hierarchies
2. Physical Attributes Facet
3. Color (hierarchy name)
4. [color and color-related phenomena]
5. color (perceived attribute)
6. color properties

Anotations

Scope note:

The degree of lightness or darkness of a hue, white having the lightest value and black the darkest. When referring generally to the relative degree of lightness or darkness of a surface, use "brightness."