The problem with focusing hard on matching colors is that quite a few of the DLC fighters we've gotten have been assigned colors that they hardly have on them. Would anyone believe Pyra/Mythra would be light green? Kazuya has red gloves; that's about it. Terry was given blue for his blue jeans, and how many characters have blue pants? In Smash alone, I'm sure we have about ten or more.
Then you also have to consider to possibility of this character not having purple at all. For all we know, this character could be mostly blue or red, but they gave it purple to help it stand out from the other characters featuring those colors. Sephiroth was given "forest green", and even though the shade ended up being closer to black, that color doesn't match him at all. If we had found out about that color prior to his announcement, no one would've considered him.
And that's assuming all of this ends up meaning something in the future.