Gray with a blue tint
Cool grey is a medium gray that leans toward blue. Grays are called cool when they have a hint of blue, green or violet in them.
The Wikipedia list of colors gives #8C92AC for cool grey and names the ISCC-NBS system as its source. The Shades of gray article shows a different and bluer value, #9090C0. It matches that to sample 203 in the ISCC-NBS dictionary of 1955. So the two pages disagree, and we could not confirm which code the dictionary meant.
The cool grey city
In a poem from 1920, George Sterling called San Francisco the "cool grey city of love." The words refer to the fog that rolls in from the Pacific. Compare this shade with cadet grey or browse more shades of gray.

