A Leucistic leopard gecko would be all while with pure black or blue eyes.
Indeed, I've seen those before.
Regardless, I've never heard the term "Pastel" outside of this breeder, and have personally never seen any work being done with them.
Technically the blizzard lizard fits the description....![]()
Pastels were light colored leopard geckos from back when you were 3-5 years old, or 10 to 12 years ago. Right around the time I started keeping leos in high numbers. Oh to be naïve of the past.