Hair dye

So, like I said, I'm dying my hair soon. And by soon, I mean tomorrow. I can't wait! I'm very excited! Because, like I said, Im dying it like C.A.P, the leader of TEEN TOP. And what does he look like?

Isn't he hot? ^_^
So, I already have the blue dye for the streak, but the problem I have is that I can't decide whether I should dye my hair black, like exactly how it is in the picture, or if I should dye it dark brown... Because, if I do black and I don't like it, I won't be able it change it for a while... But, I mean, I do want to dye it exactly like his... So I don't know what to do. >.<
My hair will be awesome once it's dyed though. Because it's cut like Niel's and dyed like C.A.P's. I'll be TEEN TOP-licious. ^_^
Yeah, I'll never say that again.
What do you think I should do?