For our current project we had to match the homes existing concrete stain to the newly poured floors. To do this, we asked the company that originally did the staining to come back.
Take a look at a couple of the photos of the fresh stain work next to the older work in the two spaces we added on to, it turned out FANTASTIC! As we wrap up the project, we will add more photos of everything together! Thanks to Concrete Visions out of Fort Collins for doing a great job.

When considering reasons for planning a concrete slab as a homes flooring, one huge perk is the Energy Efficiency of the slab. In the cold months the slab retains solar heat. The heat is then released as the interior of the house cools, helping maintain a comfortable temperature. In the summer time, and as long as solar heat gains are avoided (done by selective window placement, exterior facades or interior finishes such as window coverings), the slab helps keep the house cooler. Radiant tubes through the slab, using water, can also play a role in home energy efficiency by running warm water in the colder months and cool water in the warm months.