are these all in warm shades? I need cool toned shades

Hi there! Thank you for reaching out to us. Our Slim Lip Pencil is offered in 39 shades both cool and warm shades. They are available on our website if you were interested in checking them out!

Will this last for 24hours? Waterproof? Eating proof? lol

LOL, no, it doesn't last 24 hrs, probably waterproof, not eating proof. It's very nice, though, smooth and silky an does NOT taste like soap or perfume.

Lip liner color for brown skin?

The nyx nude truffle I think would be pretty depending on the look! Nude truffle has a deep brown to it and would look pretty on all lips 👄

Hi there! We appreciate your interest in our Slim Lip Pencil. It is not a vegan formula. We recommend trying our Suede Matte Lip Liner. Every velvety-matte lip pencil shade goes on smoothly and provides a perfect matte base. This product is also Vegan. We hope this information is helpful and that you continue to explore our products with confidence! https://www.nyxcosmetics.com/lip/lip-liner/suede-matte-lip-liner/NYX_355.html