What does "tint" mean?

Tint: A slight coloring. Specifically: -- (a) A pale or faint tinge of any color. Or blend in beauteous tints the colored mass. Pope. Their vigor sickens, and their tints decline. Harte. (b) A color considered with reference to other very similar colors; as, red and blue are different colors, but two shades of scarlet are different tints. (c) (Engraving) A shaded effect produced by the juxtaposition of many fine parallel lines. Tint tool (Eng.), a species of graver used for cutting the parallel lines which produce tints in engraving.