the bottom half of my hair is brown, and the top is bleached blonde. well its trendy and cute, but i am over it and i need to know the best way to get back to my natural color....brunette. i am afraid that putting a dark color on the blonde will turn it almost black. also, is there a way to blend a colored brown with my natural roots as they grow? i guess i am just asking what is the healthiest way to do this?