What can be used to color concrete garden ornaments after they have already been made?

Just as deeder babe suggested, an arts and crafts store sells stains, and you can also dilute paints you have 50/50 to create your own stains..just make sure that what you use, differnet color wise are compatable products..use either all oil based or all acrylics(water soluble) products...of course water borne are easier to clean after and quicker drying time...When they started this "whitewashing" phase of cabinets etc in new houses years ago, we made all of our stains from paints..didn't have to buy the already made pickling/whitewash paints for you pay twice as much, with less product....make your own with latexes..add 50% water