My perfect shade - Garnier Olia Hair Color 4.0 Dark Brown. I made the switch to Olia about 3 years ago, and I absolutely love the results I get with every application! Garnier Olia Hair Color is completely different from any other hair color I've used before because it's an AMMONIA-FREE formula, formulated with 60% natural flower oils and it delivers a permanent, long lasting color with 100% GRAY COVERAGE! Also, if you are sensitive to that harsh ammonia smell like I am, you'll love using Olia Hair Color because Olia has a great floral fragrance so you can actually enjoy the application!