For this task, I chose a multichrome holo polish by Enchanted Polish. My bottle lost it's name tag, so I have to guess which one it is, but I'd say it must be Kids. The polish has a subtle holo effect and shifts from teal over blue to a pink leaning purple. I used three coats for opacity (you can also wear one coat over black or another dark base polish).
The flowers I stamped with MoYou London Black Knight and Bundle Monster plate BM-XL217 (in collaboration with Tanya Wish). As ususal, I added one coat of KBShimmer Clearly On Top.
Enchanted Polish are available at Pshiiit and their own shop.