To me that looks like a combo of l/l and l/g. My picks: Either MAC Plum Soft or Velvetella l/l depending on the depth you want. Probably Plum Soft would better for you since you say dark lips don't work that well for lip size.
Now for the l/g Pop Mode would be perfect. If you want to make the color lighter mix it with just a very little bit of Pink Poodle (not much) and apply clear l/g over the combo.
If you have BeneFit Mr. Frosty that would be perfect in the middle of the top and bottom lip to help open the darkness up and make your lips look fuller. You can also use an l/g like Snowgirl in the middle too.