Looks super pastel to me. With the blushed appearance (whitish areas) on the yellow and black coloration. The yellow in this pastel seems diminished. The patterning seems consistent with pastel. The green eyes are also consistent with the pastel gene. See if the seller can show you pictures of the parents and tell you what they were. Ask him to put it in writing for you for your records too. Good luck. That's a gorgeous animal. The blushed out head stamp is something used to pick out super pastels also. The yellow could just be a low expressive color in this particular individual snake.