My hair: To color or not???

I have been leaving my hair alone for about 9-10 months. I like how I have quit messing with it and let it time to breathe and be healthy. Since doing that and washing it with cool water I have noticed it has grown really fast. I have to cut it every 2.5 months due to the ends growing out so fast. However I am getting sick of my hair color it looks so blah. I was thinking of coloring it.

This is what my hair looks like now.

I know my hair is kind adark and will not look exactly like this but this is what I was thinking of getting . Going  for the subtle caramel color looks. But it might not look exactly like this on my dark hair. What do you girls think? Should I take the plunge of color or what other alternative shall I look at?