21.   The base of the tree was stained dark gray, and its bark was deeply fissured, from dog-leg-level to the ground.

22.   The dark gray will not show the dirt and presents a nice contrast to the white tile.

23.   The sky was dark gray, the air was raw and the sea was crashing into the pilings below in breakers more than six feet high.

24.   This one can render a very dark gray, so the problem is much less obtrusive.

25.   And the sky turned dark gray with a pukey green undertone.