There should be two dark modes: a simple dark mode, like most dark themes today, to work in dimmed lighting, and an actual night mode, designed to be legible but not mess with adaptation in total darkness. I don't know the research on this (and I'm sure military and aviation have lots of data here), but intuitively it should use mostly thin red and green lines.
Like nightmode in Stellarium: https://www.stellarium-labs.com/blog/nightmode/
Give me back the Saab Night Panel. All I want is my speedo.
https://i0.wp.com/saabblog.net/wp-content/uploads/2024/08/Ni...
Some cars (Honda Civic) had this feature where you could change the theme of the UI and it had 3-4 presets (blue, red, amber, green IIRC). That was before those screens were just a built-in Android tablet and sadly it didn't carry over.
But you're right and it's the reason most german cars had red illuminated gauge clusters until a few years ago.