129 Transparent Bluish Violet with Glitter / Glitter Trans-Purple
BrickLink: Glitter Trans-Purple
Used from 2000-2006, first in Belville then in Clikits.
Note: Lego now uses short acronyms for many of their colors, which are visible on BrickSet. The acronym for this color is "Tr. Br.Bl.V.G.", which implies that the name has been changed to Transparent Bright Bluish Violet (w/) Glitter, which matches the un-glitter version better.
Does not glow under a UV light.