I think I have discovered a cosmetic bug/glitch with the Hollowjack style within the Outfit System. (PC - NA.)
The special light/glow effect on the weapons does not show up on weapons on your primary bar, but the glow/light effect does show up on weapons on your secondary bar.
The following screenshots show, detail, and describe my issue:

Screenshot #1 that shows the current differences between a dual-wielded Hollowjack weapon with the exact same dye color combination, but different results. One has the special light-glow, whereas the other one does not. This should not happen. https://imgur.com/OWFWjgy
Screenshot #2 of my current secondary bar. This is exactly is what I want on my primary weapon bar, but this is currently not possible. Primary weapon-slots will not show the glowing-light after confirming the appearance (it may show it during the customization process; but, it will change to a different color after you already confirmed your look. https://imgur.com/cvMMx77
Another screenshot (#3) of the glowing-light special effect on Hollowjack versus no effect. Again, the exact same dye coloration.https://imgur.com/f1sYgx3
A screenshot (#4) of my current primary weapon bar, even though it has the exact same dye colors as the secondar bar, but for some reason the Hollowjack glowing-light effect does not occur.https://imgur.com/SVU39Q8
Final screenshot (#5) of what I want, but cannot seem to receive. I can only achieve this appearance on weapons on my secondary bar, but not the weapons on my primary bar. https://imgur.com/fRpZHQB

In addition, the color of the Hollowjack glow appears to take the color of your actual weapon dye before it, or your current weapon; so, for my case, this was red/black. The Hollowjack style itself has no 2nd coloration (the 2nd dye-slot is blank/empty) of the 3 dye-slots; however, it will take on the color of your previous and/or current weapon dye in stead of having the natural glowing-light special effect that Hollowjack is know for.

I spent thousands of gold trying to get a good look for myself on this character, and even more gold spent going back and forth trying to see if this was a glitch or intended, but it definitely appears to be a glitch since I am unable to achieve the weapon light-glow upon after confirming the appearance (it will show the light-glow before you click accept, but, afterwards, it will show the wrong color in replacement of the glow). This seems to only occur when dual-wielding weapons on your primary weapon bar. My secondary weapon bar appears normal, as it should be on my primary, but as you can see from the screenshots, or testing it out on your own, this is not the case.

I reached out to Customer Support about this. Hopefully I will receive an explanation and confirmation about this issue; if not, I should be refunded my in-game gold because the weapons' Outfit appearance changed from one appearance to another, different appearance, after already clicking accept and submit on the Outfit confirmation..

I already had 2 friends willingly duplicate this problem, but if anyone else wants to test this Hollowjack weapon-style Outfit issue, then feel free.