Normals can have pretty extreme blushing. Some of the more subtle morphs come with blushing as well - fire comes to mind. Not all fires have headstamps and some normals do so it's really hard to make a positive ID on some of these rescues without background info. As a general rule, normal til proven otherwise. That boy looks really light though, I'd personally plug him into a female fire. Even if he doesn't prove out as a fire his blushing and lightness would only enhance your fire babies imo.