Board Thread:General Discussion/@comment-130.245.192.22-20170629055623/@comment-26397825-20170629194606

Weiss' aura is not the cyan colour of the dust though. It's a very silvery blue, much paler than that.

So either they screwed up Weiss's aura colour and it just happened to also be the colour of whatever machine made the barriers for Amity Colloseum and Neo's aura colour...or they made a Barrier Dust because is easier and cooler and can be used by people without their aura unlocked via machines. Which makes sense in a world where not everyone has their aura unlocked and there are monsters intent on destroying everything you are.