Blue

Riddle: There was a one story house. The house was blue, the beds were blue, the people were blue, the walls were blue, the dressers were blue, the closets were blue, the doors were blue, the T.Vs were blue, the pens were blue, the pencils were blue, the staplers were blue, the computers were blue, the phones were blue, the CDs were blue, the pets were blue, the carpet was blue, the tile was blue, the books were blue, the papers were blue, the chairs were blue, and the pillows were blue. What color were the stairs?