Painting Wood Floors: Painting wood is an easy process and the results are surprisingly durable. All you need to do is prime the wood, paint, and then apply three coats of urethane. If you apply two coats of urethane every two years, then you will keep any scratching or chipping under control.
Stained Concrete: Once considered a gritty industrial material better suited for sidewalks than posh interiors, concrete is starting to gain some respect in the design world. It's a cheap dependable material that will give your home an urban modern edge. Concrete can be stained any color with chemical acid or dye. It's then sealed with acrylic and a top coat of wax, and you've got a floor that will last years without a need for maintenance.
A word of warning: blue carpet is risky, and while rules are made to be broken, it is harder to pull off.
For more blue floors check out, Blue Kitchen Floor by Elmslie Osler