1 - Appearance.
Getting an interesting quality visual feel, to your project. The use of color is important. A good start is a solid color for the floor . Think about adding a border of a different color to the floor. Create a border by alternating different colors. This kind of visual treatment can create a more interesting floor.
2 - Basics the use of the same color of tile.
When using the same color both for the floors and walls. Here is a trick,choose ones of different size. One size for the walls and one size for the floor. How about laying the wall tiles diagonally.