Many ways you can do to maintain the cleanliness of the house, as diligently clean up some dirty room, complete with some cleaning equipment such as brooms, vacuum cleaner, doormats, and a few other supplies. As for the particular condition, you just put the doormats in every room there, like the rooms, living room, and several other rooms which if required.
There are several design and shape of a doormats, so you can choose according to room conditions. As for the color I think it depends on the desire of each individual, whether wanting a unique design with a combination of a certain color, or some other desired color.