How to make your concrete look like tile.

I am listing a house that is fantastic, and the owner is an artist.  In her painting room, she has a floor that appears to be tile, but it is not; its concrete.  She laid out electrical tape in the shape of tile.  This kept the lines rough and one color and then she chose two colors to sprinkle in the squares and swirled them around.  No two tile is identical but by using the same two colors (she used white and a lighter gray than concrete) it appears they are tiles with small design differences. 

She said now when she makes a mess painting, its easy clean up.  I think this is awesome and would like to try it even maybe outside on a porch or patio. 

That brings me to another idea, what if you used stain instead, a richer look maybe?  Hmm