They bought out some mixology colours (think they called it that) which go well over colours to give them a bit of glitter and you can layer these over each other. They are ok but wouldn't get them to start if you want some to build up. The fountain one is a sheer green shimmer so quite light and see-through on its own but under the st barts, which is a lovely blue, it looks really nice. The Vegas vixen and mayhem in Manhattan are both glitters so you could put them over a red/silver/black to give more depth or stand out. Hope that makes sense. Always easier to explain in your head than typing it out! :0)