Mauve Lips are an easy pick for me since I have very pigmented lips and its one of those colors that evens them out quite nicely. A couple of products I'm currently loving and mix to get a custom mauve lip - MAC Syrup and BUXOM Full Bodied Lipstick in Swinger. Syrup is sheer and light, so its a light wash and Swinger, which is a lot more purple adds a little more of color when dabbed on top of Syrup.
I quite like Syrup by itself and Swinger, always as a sheer wash so mixing these two is a great way to get a deeper tone. Of course, you can use something a little more plummy for a different variant of mauve - this leans a tad purple and looks flattering and wearable, especially on most medium/dark skintones. I like to pair this with some sort of simple brown eyeliner and a neutral blush.
Have you tried any of these lipsticks by MAC or BUXOM?