American National Colors

This page outlines the colors used in the roundels and on the rudder of American WWI aircraft, as measured by comparisons to surviving fabric and paint samples. While the reds were fairly consistent (a little more brick-red than fully-saturated red), there was much more variance in the blues.

Pure white needs no further explanation, but there may have been a slight blue tinge to the white center circle. The Windsock Datafiles provide no further information on the subject.