First thing, let me say that I do not use invision.
I have someone in one of my channels that's TRYING to use it, and needs help.
I have searched the forum, and not found an answer to this, so here's the question ..
Where do you look to STOP invision from changing the text color displayed in the channel (in other words, it's NOT shown on someone else's end as their default text color)?
I had them remove themes, and it still did it, so I know nothing else to tell them.