I just realized that glow color "Yellow" does not glow as much as an item that doesn't have any Glow Color value set.
I've got an old set of New Captain Gauntlets which doesn't have the Glow Color attribute. Figured I'd get a new one (yellow item) from NPC and refine that to the same grade (10) and stick a Yellow glow color on it. Initially it was White as all NPC items seem to have nowadays. Anyhow, it doesn't glow as much as the other one. Screenshot below:
Figured that the "non-glow" color would be the yellow one for the New Captain Gauntlets. Apparently not. Is there a way to remove the Glow Color attribute from an item?