interest and variety and intensity

the timbre of a musical sound

an outward or token appearance or form that is deliberately misleading

the appearance of objects (or light sources) described in terms of a person's perception of their hue and lightness (or brightness) and saturation

(physics) the characteristic of quarks that determines their role in the strong interaction

any material used for its color

to provide a misleading or deceptive explanation or excuse for a situation

to fill in or apply colors to the enclosed spaces of a line drawing