Time: 10:30pm GMT+1
Frequency: Always
World name: Ragnarok
Character name: Vikki Goldray
Retainer name: -
NPC name: -
Monster name: -
Class/Level: Ninja Level 60
Party or solo: solo
In-game time: -
Area and coordinates: -
Housing: -
Steps:
1. Pick a dyed item, click "Try on" and use the new dye preview feature
2. Click on "Terebinth" and then "apply"
3. Wonder if it's a bug or not

It seems that the dye preview registers the color you used to dye the item as its new original color.
Example:

Saurian Shirt of Striking has a white base color, this is the color you can change with dyes. However, I've dyed my shirt black and when I try it on, open the new dye preview and apply Terebinth, it won't show up as white, but black.
Is this a bug? I think the item should revert back to its original color, not the last one you dyed it with. Especially since some items have unique colors that are not part of our current dye spectrum.

edit
Tried it on different items, nothing changes. Seems to apply to all items.