Wow, that's quite a question! I'm afraid without any specifics, the best advice I can give you is to mimic nature. Without sounding too much like a hippie, Mother Nature gets color palettes just right.

So if you're looking to mix pastels, look for the colors of Easter or pretty spring flowers. Keep it all in moderation, for example you can dress in neutral beiges but add touches of sweet pale pink or lilac here and there.

For earth colors, look at summery & fall colors, like gourds (pumpkins, squash, etc) and eggplant. Balance them with black (like black tights) and don't go overboard with too much "earth" in one outfit. One idea that I like is wearing monotone colors like blacks and greys, and adding a punch of earth tone pop with maroon or eggplant colored tights (check out welovecolors.com for a great selection).

Hope this helps you dear!