Can hair dressers do this ........?

my hair is light brown with blonde slices of hi lights but i want to go darker but keep the blonde bits.. is there any way they can colour my hair whilst keeping the blonde not dyed and kept blonde? or would this be impossible? thanksCan hair dressers do this ........?
Yes, it's called lowlights. They will put panels of dark brown through out your hair like highlights.Can hair dressers do this ........?
Of course, they would simply add low lights to strands of your natural hair colour and avoid dying the blonde strands.
Most likely, as your hair dresser.