I actually did the opposite for my wraith v.2 a while back. I asked for more blue in the mix, and it's a really beautiful purple.
Point is, they are more than happy to help their customer base find that extra touch that makes a saber more personal. Also, just to let you know, a white (AS) led with some colour filters will crate any softer (pastel) colours. Magenta being one of them.
Cheers.