Is my Pastel a combination morph or a decent-quality pastel?

I am new to the herp world as of August 2013 when I bought Toulouse at an NARBC Convention in Arlington, Texas. He was sold to me as a pastel. His blushing has also decreased since he was a baby and he is about a year and a half old now. I had someone tell me recently he looked like he is mixed with a morph other than pastel, I was curious whether or not any of you think that could be true? If so, what combo morph, and if not, is he a high quality or low quality pastel in your opinion?


Him currently, July 2014
http://i82.photobucket.com/albums/j2...ef2ae419d9.jpg


The next two photos are sometime within the last spring semester/perhaps late winter.

http://i82.photobucket.com/albums/j2...5d6327cb05.jpg
http://i82.photobucket.com/albums/j2...01010166_n.jpg


And then this is him when I got him August 2013

http://i82.photobucket.com/albums/j2...0a1f9262_7.jpg
http://i82.photobucket.com/albums/j2...81201239_n.jpg


As you can tell, his blushing has diminished greatly since this photo of him as a babes^

Looks like a nice lemon pastel to me. Congrats! That's a really good snake with generations of good line breeding in my opinion. I could be wrong though?? I'd like to hear from some one with more experience but I have seen pictures of several lemon pastels the look very close to that.