Or, if it is a shed, they start to get dull and then turn "blue" when the liquid between old and new skin builds up. This will go away after a few days, then expect shed a couple days after that!!
0.3 Normals (Coilette, Athena and Mary Jane)
1.0 Pastel (De Sol)
1.0 Spider (Zeus)
1.0 Mojave (Prometheus)
0.1 Brazilian Rainbow Boa (Stella)
0.1 BCI (Kiyoko)
0.1 Dumerils Boa