I don't think she is a silver bay to be honest. I think she is a chestnut with seasonal sooty.
Some of the pictures, in fact most of them, are really bad for judging a horse's colour. They are great in terms of photography, but pics taken in the "golden hour" just before sunset tend to have a lot more red and yellow in them than the horse does normally.
I don't think she is silver because of several things. First, the colour of her coat is too "chestnut" in several of the pics, including your avatar. Silver bays tend to have a deeper reddish brown, rather than the reddish orange of a chestnut. Secondly, horses with silver usually have white eyelashes, which she does not. They also usually have some striping to the hooves, which again, she does not (it wouldn't be on a hoof with a white marking, but she has a leg without white that has no striping).