He drew a momentary blank and he corrected himself right after. I have trouble remembering all of the ball pythons combos, giving them names that are not descriptive makes it harder. Watch the video again, he does answer the question shortly after he says he doesn't know.
Also it's one thing to remember a lemonblast is a pastel pinstripe because it is a well known morph that has been called that for a while. This was something new that he named before he produced it, it's a little different.