I decided to go down this route too, covering over a rough boarded but level concrete floor. The tiles are bright green (Aventador) and I am really pleased with them, especially as you can see every speck of dirt and any dropped bits and pieces instantly. The other advantage is that the tiles can all be taken up and moved to the next house. I'd post a photo or avatar showing the car and floor but as a novice I am struggling with this even though I have downloaded the images onto the TM Image Library.