• Bluish gray
• Bluish-gray in color
• Dark bluish-gray
• Dull blue-gray
• Gray
• Grayish
• Grayish in color
• Like a fine-grained rock
• Like an overcast sky
• Like many roofs
• Like overcast skies
• Like the color of some roofing
• Somewhat bluish-gray
• Sort of gray
• Stone-gray
• Stone-grayish
slaty cleavage - сланцеватость
1. геол. сланцеватый
~ cleavage - сланцеватость
2. слоистый
3. синевато-серый, цвета сланца, аспидный