Definition of "darkish"

If a man also or a woman have in the skin of their flesh bright spots, even white bright spots; then the priest shall look: and, behold, if the bright spots in the skin of their flesh be darkish white; it is a freckled spot that groweth in the skin; he is clean.

1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Leviticus 13:38-39

[…] if […] the lead be blown off from the silver by bellowes, that which would else have gone away in the form of unheeded steams will in great part be collected not far from the silver, in the form of a darkish powder or calx; which, because it is blown off from silver, they call litharge of silver.

1661, Robert Boyle, The Sceptical Chymist‎, London: J.M. Dent, published 1911, Part I, p. 41

We staid till, it being darkish, we saw the fire as only one entire arch of fire from this to the other side the bridge, and in a bow up the hill for an arch of above a mile long: it made me weep to see it.

1666 September 2, Samuel Pepys, Diary

The village was darkish under the shade of broad leaves.

1934, George Orwell, chapter 14, in Burmese Days‎