1635 D. Person i. 10 The Moone..appeareth blackishly browne, yet not altogether destitute of light.
1890 Aug. 587/1 The metal electrode shows itself to be blackishly colored.
1901 25 Extracts Proc. p. ccxx Flowers whitish, with blackishly fringed lip.
2008 R. Deonandan in J. Armin & N. G. Moore iii. 182 ‘What you doin', child?’ He coughed blackishly. ‘I said I dyin'.’