The first idea is simple and usual - natural lips with a soft glow. For those who doesn't want a lipstick. Great and sexy choice.
The second idea is bright lips! Vibrant red.
Furthermore here I have one trick. As you can see in the picture the lower lip is lighter than the upper. I used a red colour with orange shade for the lower lip, because I wanted to create fuller lips effect and enhance them. You can try it with other colours as well.
pictures by Makeup Demon