Definition of "duskish"

duskish smoke

1590, Edmund Spenser, “Book I, Canto IX”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, stanza 44

For though Contraria iuxta ſe poſita magis illuceſcunt [opposites placed next to each other shine more brightly] (by an olde Rule) yet it hath beene ſubtilly, and indeede truely noted that our Sight, is not vvell contented, vvith thoſe ſudden departments, from one extreame to another; Therefore let them haue, rather a Duskiſh Tincture, then an abſolute blacke.

1624, Henry Wotton, The Elements of Architecture, […], London: […] Iohn Bill, II. part, page 104