What hair colour would make me look older?

[Have no name so rgv]

I'm a 17 year old guy but I look a 12 year old and it's so frustrating. What colour should I dye my hair to make me look older, also what are some other ways to look older?
here's an image (my twitter profile pic) http://twitter.com/account/profile_image...reflang=en
my hair is a light brown colour and longish, goes past my eyes, if you don't have twitter lol

[Emma]

maybe get it cut, but only slightly. still so it goes across like a swish. i like your hair.

[Courtney Lee]

I don't have twitter, but I always think that darker hair makes people look older, and it also makes your eyes stand out way more!
And try getting layers, and get the layers to frame your face.
Goodluck