Denny,
I have never seen those colored floor mats that were used in late 1954 and 1955-1st two-tone interior trucks. I do not know if they were the full floor mat or, more likely, a smaller molded rectangular/square floor mat that was placed on top of the full floor mat. Greg might remember?
I do not think that I have a description or illustration of the colored floor mats in any 54/55 documentation, even where the two-tone interior options are shown or described.