Definition of "teint"

For time ſhall with his ready pencil ſtand; / Retouch your figures with his ripening hand; / Mellow your colors, and imbrown the teint; / Add every grace, which time alone can grant; / To future ages ſhall your fame convey, / And give more beauties than he takes away.

a. 1701 (date written), John Dryden, “Epistle the Fourteenth. To Sir Godfrey Kneller, Principal Painter to His Majesty.”, in The Miscellaneous Works of John Dryden, […], volume II, London: […] J[acob] and R[ichard] Tonson, […], published 1760, page 201