[Question]Regarding effects

[baba88899]

Hello everyone, I'm getting to know coloring textues and effects, and I tried to create black effects (in 2nd rb aura or soul garmet for exemple).
In both of them, when I color the effect black and go into the server, the effect becomes transperent.
I've searched "Black" in the search bar and couldn't find anything related.
can anyone please help out?

Thx in advance