Yes. some lip shades can make your face look more red. And you have to find the right shade of nude, some willl make you look washed out.
Its alot of trial and error.
Ofcourse, someone with dark skin isn't going to wear a light pink and someone with pale skin won't be wearing plum. It's all about color palette.
Yeah! Why not, but colour it in nice tones. . . I think i fail here hehe