Had this happen a few times.All i had to do was use the dye remover and take it to the original color.Then it kept the new color.
Well got a total make over kit to change glow to see that there was no glow at all.So came to forums and found this post on it.Wish i would of found this post first instead of spending my gems on it.
Support ticket 130214-000361
Not affiliated with ArenaNet or NCSOFT. No support is provided.
All assets, page layout, visual style belong to ArenaNet and are used solely to replicate the original design and preserve the original look and feel.
Contact /u/e-scrape-artist on reddit if you encounter a bug.