The rabbit hole you sent me down was deep. And rewarding. One of the many resources that ChatGPT unearthed was this reference document which, along with some great livery advice, contains 27 PAGES of HSV equivalents to Real Car Paint colors.
Given the difficulty of matching decals to Real Car Paint (which the author discusses in detail), I'm thinking it may be better to use the free HSV version instead and thus be able to match the decals more accurately and with less effort.
PS I liked the process that ChatGPT used to get your purple. It looked for the official name of the paint based on "purple" plus the car model, then searched for photos based on that paint name, then sampled the color from the photos, then used Python code to determine the HSV values. It took a while!