With a minimum amount of skill and patience with a trowel homeowners can add color to conrete. Three methods are available: the sprinkle-on method, the topping method, and the entire thickness method.
Bear, W. F. and Hoerner, Thomas A.
"Colored Concrete For Your Home,"
Iowa Farm Science: Vol. 19
, Article 7.
Available at: https://lib.dr.iastate.edu/farmscience/vol19/iss10/7