What does perspective mean in art?

Atmospheric perspective, also called "aerial perspective" refers to the changes in color that occur when objects are more distant. These changes are the result of the way light is scattered as it passes through air, modified by distance and atmospheric conditions like fog, mist or rain. Atmospheric color effects are generally more pronounced with increasing distance. As a general rule, colors of objects in the distance are lower in chroma and higher in value than colors of objects in the foreground. If the distance is great enough, the hue of colors tends to shift toward blue.