For me it consists of my favorite colors. Green and lurple being my absolute favorite colors. Followed by pink orange and black. But i think the orange green and purple looks so good on a black canvas.
Because 1. There are always 2-3 when most colors are 10-12 so it sells alot quicker 2. If something is limited people always buy it first because it’s limited 3. Some , and I mean some not all, think that reselling rate will be higher because it’s limited 4. It’s more unique than other color patterns 5. Probably personal preferences