Are gray boots cool?

While I was out and about window shopping yesterday I came across to pairs of shoes/boots that I wasn't sure if I'd ever wear...but LOVED. What are your thoughts?
Payless Booties on sale for $29.99

Aldo Pricilla boots for $130

Is gray a cool color to wear? My mind feels like it would wear like a neutral and therefore I'd get more wear out of the color...but I've never owned a gray shoe before. So thoughts would be appreciated.