I don't see Pastel on the head or a bias in the patterning. I don't see the markers for Fire or YB. I think people would label this one as 'Butter' due to the yellow coloration and melty pattern. I would call it a high-quality Lesser.
thanks, what would be YB marker for such bright snake ?
YB will make non-matching pixelated colored scales on the sides near the belly. On some snakes it is not clear whether or not it is just normal patterning or actually YB, Asphalt, or Gravel--then ID becomes more challenging. In this case there is no unusual coloration.