You search online (also not everyone list their world first I have 5 or 6 more I have not listed), talk to various breeders etc.
Gorgeous!!!
@gpreptiles that is a beautiful snake! Congratulations
Not sure if it’s a worlds first, but I haven’t found it anywhere else. Black pastel lesser Orange dream banana pos specter.
Here is a handfulf of stuff from the last two seasons… Only ones I have on this computer but I have a few more lurking in the racks/archives

Absolute beauties!!!
They are all beautiful.
What is that last one?
9 Ball Matter.
Cinnamon X Black Pastel, Lesser, Champagne
I hatched her on Aug 1st 2019.
Second year for that pairing.
I believe her to be a “world’s first” I mean who would hide something that looks that good.
I hatched out a Cypress Pastel Leopard Mojave Hypo that’s a highlight of my season. Made a lot of cool Cypress Hypo Combos
Killerbee Acid
Cypress and hypo work so well together…absolutley love every combo I see from that pairing
What’s the first one?
My two are Hypo Red Widow and Redhead Mojave Spider Hypo