I know someone with blonde hair and when she dyed it green/blue it looked awful... it looked mouldy =S Thankfully she dyed her blonde hair before I dyed mine (I have blonde hair too), because I was thinking of green/blue.
Anyways, I don't think you should dye it, but that's just my opinion. Although, if you have to dye it... why don't you try streaks of black? Black goes with anything. (I'm a bit obsessed with matching clothes, jewellery and hair). Try not to bleach it or straighten it too much... those things combined trashed my hair... if other word: my hair looks like I've glued straw to my head! But I'm treating it and it's working slowly.

Anyways enough of my ramblings!

(this is also my first post =P)

I need to show off my new haircut. It's super cute! Sadly the black faded into a brown colour and my red-violet peek-a-boos are also fading T_T