Purple and orange make sense color-wise, but I assume you're getting more at the encroachment onto the Suns' colors. I don't care for the jersey too, or the entire concept line the league has gone with here really, but it's clear that because they already have resurrected the kachina line, this is it in terms of retro jerseys without coming up with a new, dated look, kind of like how Las Vegas invented something entirely new. Plus, because they were doing a reverse on the color palette, you either were going to get an orange jersey or purple as those two colors were the only others of significance on the previous incarnation.
I'm sure a few of these jerseys across the league are going to stick and make it into teams' regular wardrobes, so in terms of that the reverse retros will be a success. I'm sure that they'll come up with another of these broad stretching themes for the entire league to do again sometime in the future to try and make things stick for this crop's duds, and surely nothing is stopping a team from coming out with another independently designed jersey in the meantime.