I try to stick in the same color family. i did aqua toes last year because I got a new tattoo on my foot and its different shades of blue, so the color matched my tattoo LOL But for my nails I did a french mani but instead of the pinks or nudes I did a light blue color. I HATED it. I felt like a bridesmaid. Then the manicurist took creative liberty of doing a sparkly silver streak b/t the blue and white tip and it was even worse. I took it off the next day! LOL

I do black on my toes ALL the time. I keep my toe nails short and do black toes and then I can do whatever color fingers I want. I love color and I have a darker complexion so I go nuts with the burgandys, oranges, even purples on my fingers. I have really long, really fat fingers and really long strong nails, if I cut my nails short my hands look like man hands, if I paint them too light it does not match my skin tone so Ive learned to accept my 'man hands' (my hands are huge) and paint them in fun colors that match my skin tone. If the color is really wild I will have the nails cut shorter though.

PS - they do not need to match at all. My girlfriend did her toes pink and her nails lime green. She reminded me of a spring flower or easter egg, but it was super cute! :)