I have natural medium/dark brown hair. I have been coloring my hair (same color) to cover a few grays. Got bored with the brown so I used l'oreal sun kissed caramels, UL51 natural brown. My hair turned out kind of a dark blondish with an orange hue with a few copper strands, and did NOT cover any gray. It's not a bad color, but I really don't like it. It's been this color about 3 weeks and my natural roots are showing pretty good. I want to go back to my natural color. What's the best way to do this?