... I think I would prefer this blue look.......
I most likely would prefer this blue look too. As I posted above, it is quite dramatic and places the subject well (under black light).
What I am suggesting, since black light is so radically different from 'normal' light, setting white balance to black light will produce very different results, those results dramatically demonstrate the effects of setting a custom white balance.
Again, results from a black light white balance setting may not be as pleasing as AWB, the exercise is highly worthwhile just as an exercise, you'll at least start becoming adept at moving away from AWB in other circumstances if and when needed.
To set, shoot a gray card or something white under whatever light you wish the camera to think of as white.
Don't know what model you shoot, on 6D, 3rd menu from left, scroll down to 'Custom White Balance'. > Set > only compatible images displayed. Scroll left or right to your reference photo, hit the set button. That puts you back to the 3rd from left menu, scroll up one to 'White Balance" > set > scroll to the custom icon.
Once a custom WB has been set, go back into the menus or use the Q button to activate it or any other of the WB options.
You're essentially lying to the camera about what is white and giving the camera no choice but to comply.
Do give it a try, the capability to set and use customizations like this are among the reasons to buy and use DSLRs rather than accept smart phone limitations.
WB and Custom WB are DSLR power tools and good to know how (and when) to use. .