For my fair skinned beauts: Try a lipcolor that has a blue or pink undertone. Going straight purple will wash you out and make you look like a ghost. Try something like Loreal Colour Riche Lipcolour in Sea Fleur 630:
For my loves with medium skin tone: I'm in your boat. Usually I'm one to stick to nudes, peaches, or corals. But I while I was browsing around the makeup racks at Ulta, I found the perfect shade of deep berry. And with me it has to be the PERFECT shade to go dark. The color is Ulta Lipstick Totally Berried #247:
For dolls with olive skin: Use a lipcolor that has an slight orange or berry undertone, There are so many options available to women with olive skin. Everything looks great on them. I love MAC Hang-up:
These are just a few suggestions. Let me know what your favorite plum, berry, or purple shade is! Like I always say; it's all about what makes you feel beautiful, confident and amazing!