Well, we tried it out. If he's in the light, you can sort of see it. Subtle was the word I used. It's a cross between a very light green, yellowish highlights, and the green you get from swimming in chlorinated water for too long. But, I don't think it looks bad
, just not bright green. But, I'm just surprised the color took at all. If we do do it again, we'll just leave it in longer and heat it with a hairdryer. Bleaching isn't an option because his mom was rather upset that he dyed his hair at all.
I don't have any pics because the change is so small that my camera was just making his hair look yellowish.
Silver, I think red highlights would work well without bleaching first. From what I've read, the hardest colors to get are the unnatural ones, like blue and green. When I had blue streaks (and I had bleached my hair first) I was lucky if it lasted a week without fading to a light greenish blue. Also, bleaching's just a pain in the butt.