 Sometimes, Pantone Matching System (PMS) approximations to the flag colors are used.One set was given on the website of the U.S. embassy in London as early as 1998; the website of the U.S. embassy in Stockholm claimed in 2001 that those had been suggested by Pantone, and that the U.S. Government Printing Office preferred a different set.A third red was suggested by a California Military Department document in 2002.