Visibility issues in terminals with white background

This is how McFly looks like in a terminal with a white background. This one specifically is the gnome-terminal with Xterm color profile with black and white as foreground and background colors respectively. However, it is very likely that this will happen in almost any theme with a white background color.

The issue seems to be that you are using "color 15" for drawing the foreground text instead of using the foreground color. Here I changed the "color 15" to red in the terminal theme.