When you first encounter Juhani in the grove, she wields a lightsaber with a red crystal. I don't think she would have bothered to change her color crystal after killing her master. Seems a bit odd no? There's no workbench out there.
For 1.0, I propose changing her color crystal to blue since she is a Jedi Guardian. I guess it would be categorized as an Inconsistency Fix.
My inspiration for this comes from evilhazardz's Juhani's Grove Saber Change mod.
His readme:
A simple mod that changes Juhani's weapon in the grove from a Red saber to a blue saber, as I thought it was quite out of place that she had suddenly decided to use a red lightsaber, as she wouldn't have time to get a red lightsaber on Dantooine, ala Anakin in episode 3 when he goes all evil on everyone, yet he still uses a blue lightsaber.