My colorful polish is KBShimmer Rollin' With The Chromies, a holo multichrome shifting from cyan, to blue, to red orange, to burgundy. I used three coats for the pictures.
For the stamping I used B. loves plates B.05 let it snow and Barry M. Silver Foil. As usual, I added one coat of KBShimmer Clearly On Top.
KBShimmer polishes are sold on their website (US only) and at Harlow & Co.