His voice was friendly, but his eyes were two dead circles of dark blue slate.

The ground color of the forewings is dark slate gray.

"There's a dark gray slate that splits into sheets pretty easily."

The building's exterior is made of dark slate and stone.

There is a second bath too, for her children and guests, done in a dark slate.

The upper parts are dark slate, under parts white, bill orange red.

The roof is dark slate, contrasting with the masonry of the walls.

He paused, cleared his throat, and looked into the dark gray slate of her eyes.

Q. I have a 30-foot-long flagstone walk in front of my house with dark blue, gray and red slates.

His eyes were an extraordinary colour, a grey so dark it was almost slate.