That's been discussed pages ago.
I think it was wrong, and don't know who made the decision, but, as I understand it, the colours have been misappropriated by the TERF movement
https://xtramagazine.com/power/terf-...plainer-206866
So when you see purple, green and white together, you might immediately associate it with some sort of queer or gender terminology. (In fact, the colours made up the genderqueer flag long before they were consistently used by transphobic women’s groups.) But just as they ruined any positive associations we have with a certain bespectacled wizard, anti-trans activists ruined these colours, too.