Make my hair from copper to blonde without bleach?

My natural hair color is medium brown but for a while I've been buying blonde hair dye, like dark blonde, medium blonde, golden blonde, but so far my hair is just becoming a lighter copper each time I dye it! right now its copper/gold but I want it bright yellow blonde or bright golden blonde, how can I manage to do that with simple hair dyes I jut buy from wlmart without bleaching my hair??? Pweese help me!!!

go to the pool like everyday it may seem that your hair is getting dark and the water but it will get lighter because of the chlorine! it just makes your hair just a little bit lighter but you have to keep your hair conditioned and maybe change your eye color as well to a nice blue or green!