Brown hair is universally a flattering hair color, but it’s important to consider your skin’s natural undertones and the different undertones in brown hair before picking the right shade for you. If you have lots of warm tones to your skin (red/pink) then you would probably want to go for a warmer brown such as golden brown. If you have a lot of cool tones to your skin (blue/green) then you would probably want the same for your hair, such as ash brown.