It is just discolored. Many of these fetts discolored. It is a Hong Kong coo, though I forget which one. It is usually the one found in a Baggie or mailer. Don't confuse this fett with the light blue euro fetts, often also called trilogo or pbp fetts. They were shot in a lighter plastic and heir torso is also the lighter plastic.
I have caviar dreams and McDonald's pockets