Inspiration photo. Will my steel gray granite go with this Carrara Mozaic backsplash? Thank you!

This is a very pretty inspiration. I am not familiar with either the granite you have or this backsplash - but really the only way to tell if it will go is to get samples and bring them home to look at it. It is really hard to match colors just based on pictures. The inspiration photos are great places to start so you know what you are looking for - but you really need to see in person.