Not that I know of:
Wellesley College Athletics - BLUE PRIDE
My understanding is that Wellesley is not a rah-rah kind of school, but the athletes really enjoy what they are doing and quite a few people participate in all sorts of club and varsity sports. The school pride is definitely there, but it is not in your face.
May be you can come up with a mascot and petition the administration? When we were at Scripps, I noticed quite a few items with squirrels in the college's bookstore. When I asked if that was the mascot, the girls told me that the official mascot was the Athenas, but the students really liked their furry campus critters and adopted them as the not-so-official one.