The base on these is Dance Legend's Termo Trio 1. It's a stunning polish that goes from a blue-toned pastel purple to a more red-toned medium purple all the way to a dark purple. My nails are in the middle phase in the above picture.
I chose to mattify this design, simply because it fit the theme a bit more and made it look like vintage illustrations. I used waaay too many polishes to list them all.
Here is a bonus picture of my nails in the warmest state, starting to cool down a bit at the tips: