She's really pretty, I've been into Arabians all my life, they're the best!
She's a rose grey..... looks as if she may have been born a bay, then greyed out, seeing as she has the black points. One of my favorite shades of grey! They first horse I ever showed was a rose grey Arabian that looked a lot like your mare.
Some horses seem to grey out very quickly, while others are still rather dark even at 8 to 10 years of age. I have a friend who has an Arabian mare that is 8 years old now and a very dark black-grey yet.