I think there's currently no way:
Lyrics are automatically, by default, white on a dark theme or black on a light theme and on paper.
Chords need to be a different color, to be most easily processed under pressure, so I/we use Yellow. It stands out well and is least confusing when trying to read lyrics.
Unfortunately, yellow is really poor on a light/white background and therefore on paper.
Unless I've missed something, is there a chance of having two choices for chord colour, please? One for each theme, where light theme also equals paper. That would save a fair amount of 'Appearance' swapping when printing songs for fossils with no tablet.