California uber alles
Print on print. What about flower on geometrical print, I think it can work harmoniously if you leave the accent only on those two. Black, grey or white color base are perfect to settle the outfit with this bold prints. You can use any other color of course, but as long as it is simple and clean, never forget that less is more, so even when you are playing with prints don’t forget to maintain the main color, so you won’t look like a parrot.