This is a finished basement concrete floor that was acid-stained "Sahara tan", from Decosup's Chemtone brand of acid stain.  We decoratively scored 5' x 2.5' offset rectangular tiles in the floor to give it the appearance of being wider than it is, as the house is on a narrow lot.  This elegant looking acid-stained concrete floor was sealed with a solvent acrylic concrete sealer.