He does look like a hypo pastel and boas do change colors much like geckos and bearded dragons. They have a light phase and a dark phase and it can happen very quickly. Some locales can change color quite drastically. My BCC Suriname can go from being almost charcoal to very light with tons of pink in a matter of minutes.
----> Signature <----
*Factoid: "There are no such things as Hogg Island or Columbian boas"