Hmmm...
Honestly it does kind of look too close to Palatinate. Here's a bunch of shades of purple:
And here is an exhaustive comparison of all of them with the purple range of the moiety list:
Colours ███ Wizard: Eggplant , #3F2B66
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Wizard: Heather , #9778BE
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Nightshade , #7930B5
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Amethyst , #993BD1
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Fog , #A794B2
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Eminence , #6C3082
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Wisteria , #724D79
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Blackberry , #4C2A4F
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
███ Wizard: Arcanum , #800080
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
███ Wizard: Byzantium , #702963
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
███ Wizard: Thistle , #8F7C8B
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
███ Wizard: Mulberry , #6E235D
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Link: Violet , #7F00FF
██ █ Kappa: Purple , #8040BF (Indigo , #602080)
██ █ Anya: Lavender , #C080FF (Silver , #A0A0A0)
██ █ Guilty: Palatinate , #682860 (Pine , #01796F)
██ █ atheistcanuck: Plum , #7D0552 (Redwood , #A45A52)
██ █ Jarnvidr: Tyrian , #4F012E (Ultramarine , #3F00FF)
███ Wizard: Pansy , #78184A
I think Eggplant is tolerably unique in this range, Heather's fine too, Nightshade is too close to Purple and Amethyst is borderline, Fog is tolerably unique, Eminence is a little close to Palatinate, Wisteria might be okay, Blackberry is probably okay, Arcanum (I renamed 'Wizardly') is a little close to Palatinate, so is Byzantium, Thistle is fine, Mulberry is too close to Palatinate and muscling in on Plum, and Pansy is probably fine. What do you guys think?