@ntnsndr I’m…guilty of this in my design work right now! 🟣🟪💜😅
This is just guesswork based on my own usage, but I think it’s the natural result of blue being very overused (Twitter, Facebook) and designers seeking something that pops against white without any extremely strong preexisting associations (so red for love/aggression and green for nature are out, for instance).
EDIT: and looking at my purple Ice Cubes app, I realize it works great as a background for white text too!