Even colored mirrors are not good. In geomantic omen, some highly reflective objects are generally regarded as mirrors, such as stainless steel decoration, smooth glass and reflective cellophane. Because the mirror has reflective function, the entrance door is the air inlet of the whole house. When the door is facing the mirror, it will reflect the air into the room, so the room is lifeless and can't make money. Moreover, if all the doors are facing the mirror, the occupants will be in a trance.
I hope it helps you.