Well, many humans see colors differently. But I read the article several times and don't find where Richard s Instead the photo caption says, "Extruded powders are most often used in rifle cartridges and can be distinguished by the long, tubular-like granules. Color can vary from a silvery charcoal to a greenish brown depending on the coating."
I just looked at my supply of Benchmark, which looks silvery charcoal to me, exactly like Varget or H4831, other Extreme powders made in the same factory.