Ok so I have dyed red hair (Im actually a natural redhead but it displeased me). And its REDRED except a little dark. I got Manic Panic Flash Lightning because I heard nice things about it. Now I want to pick a shade of blue that would work on my head and I know whats on the label isn't exactly what you get. And I've heard nice things about Manic Panic blues (not some of their other colors but the blues) but Im still in like the crossfire of people saying No Manic and Yes Manic Panic-In even numbers 0o.
I am searching for a blue that could go on semi light (lightish blue) without going green on me. Christmas is not coming early this year...
If you have any advice or ideas for which Manic Panic blue to use or on another blue to use that would work on my head that would be FANTASMAL!!!!!

Manic Panic blues tend to go greenish if your hair isn't bleached enough.
So if getting your hair to a pale yellow isn't going to be possible, I'd opt for Special Effects instead.
All of their blues (except Fishbowl which is more of a turquoise), have purple tones so that you don't have to worry about it going green.

i would go with Special Effects blue mayhem mixed with conditioner. it should get pretty light if you do that

Can you post a link to a picture of your current hair colour? In my opinion some blues look nicer with reds than others but it all depends on the shade.
Personally I really think turquoise looks good with any shade of red but if the blue is equally as strong as the red it can kind of mess with your eyes. If you were going for turquoise you'd need to bleach the tips out to a nice pale blonde to avoid it fading green. You could also try mixing a bit of blue in with it if you are still concerned about it going green.