sexing with LED??

I was wondering if it is possible to go 12/12 with a blue LED setup to determine the sex or if I would have to get me a red setup. The plant has been outside but I wanted to move it in to sex it but I need to know if the Blues will work or not?

And Yes I know that LED's suck but its what I have for the time being. I'm not an indoor grower yet, just want to speed up my outdoor.