UV light colors?

Hello Gutefrage community.

My question may have already been asked,

But I just got a ceiling light panel that can also do RGB light.

And with a very dark bluish color, many things become fluorescent for me, like in UV light.

My question is, since I have a white wall, I would like to put something on it that will only be highlighted under UV light or this dark blue light and is otherwise not visible in normal daylight.

Does anyone know if something like this even exists and can anyone recommend it?

VG