Slaty
/ˈsleɪti/
Definition 1 of 2
Pro Tip 1/3Setting Descriptions
Use 'slaty' in stories or descriptions to set a moody or somber atmosphere. 
The slaty shadows crept up the walls as evening approached.
Pro Tip 2/3Not Just Grey
'Slaty' suggests a specific shade of grey, often associated with stormy weather or cold seas. 
The slaty waves churned under the storm clouds.
Pro Tip 3/3Nature Descriptions
Use 'slaty' to describe natural elements, like rocks or bird feathers, that have a grey hue. 
A slaty finch perched quietly on the window sill.