I would appreciate advice on an area rug for my home office. Color(s), pile, and dimensions. The size is important to accommodate my rolling desk chair - the chair has to be completely on or off the rug. The blue tape on the floor marks out 7x10 but if necessary I am OK with getting a custom size. And I am not happy with the look - wide band of tile floor. I would prefer not to go with a solid flat rug - advice on texture and colors welcome. I found a low shag in slate blue or grey but am concerned about how it would work with the chair. What do you think? Thank you! Low Shag Rug - Grey Low Shag Rug - Slate Blue