Banner not clearly visible in a light terminal, not really an issue
This is just an aesthetics issue nothing more. The banner seems to have been designed for dark terminals only. It is barely visible with any light theme.
This is certainly a critical show stopper issue that must be urgently addressed!
Do you have a screenshot? I've just tried this on my terminal (iTerm, "Basic" theme) and it's visible; what terminal/OS are you using?
I have Solarized Light terminal theme (xfce-terminal & tilix), Arch Linux, XFCE. This is what it looks like. Like I said just aesthetics
We're making use of the colorful crate for this.
Something like dark-light could offer a way to detect whether we need to give some consideration to the terminal theme…