What hair colour would look good for my hair length?

ok so i have just reached medium hair length, im naturally blonde and so i don't want to go brown but im a bit bored with just bright blonde and im thinking about having highlights put in. i already die my hair so it doesn't matter about cost or permission or anything. i like gisele bundchen's hair. i don't mind going darker but i would like to keep the light blonde in. its just because my hair is neither long or short its not really a nice length (im growing it) so i just wanted a change that would make my face and hair stand out more and look really good with the length that i've got. if anyone has any pictures with their suggestions then i could have a look, that would be great, thank you! x