I’d go green if you want to keep her familiar to CW era Asoka, or White for simplicity. I like the idea that as a non-affiliated force user she has more of a blank identity, and white also seems fitting with the retro designs used in the series.
I really like Yellow in KOTOR/TOR, but I see that as more of a classic era which does not communicate with the movie era - like it is clear with the scope of the Star Wars universe that technology is lost and rediscovered. Yellows and golds also hark bark to classical and antique ages - which yellow ties in well with. So it functions well in KOTOR, but maybe less well here possibly.
Purple I feel was always a poor choice in the PT. In a way I wish all PT blades were just blue.