GSE-containing samples were darker at the initiation of the study,
however L* values (lightness) of all samples increased during the
4 month storage period. The L* values of AA- and PG-containing
samples were most stable during storage. The a* values generally
decreased over time. Based on hue angle (departure from the true red
axis of the CIE color space), control and AA-containing samples were
the reddest at the initiation of the study. Hue angles of GSE-containing
samples were about the same at end of the storage period as they
were initially