This is YSL's new take on the french manicure. They will sell nail polishes in tandem so you can achieve the look with the perfect hues. Obviously you can use any nail polish brand. The point is to use rich colors and mix and match. Link purple with blue, red with orange, yellow with green. My main suggestion is to go to a salon to get it done, because if its not executed properly it can come out very very tacky. Shout out to the women at Highsnobette who spotted this first... great post ladies.