Check new colours work OK with white background

[craigbox]

Overview

https://twitter.com/Didicodes/status/1699084012050850047/photo/2

[XDRAGON2002]

I suppose a major scope of improvement for this lies in replacing the yellow text we have.

It'd be better to instead have a contrast neutral colour which looks good on both black and white, all the other existing colours look good for both the backgrounds as far as I can tell (other than yellow).

[craigbox]

Is it practical to detect "light mode" and "dark mode" and use a different colour throughout?

[XDRAGON2002]

We could do that.
It should be possible, though I haven't taken a look at the "how" to make it possible, I do believe there must exist a library to tell us what the current theme of the terminal is.

The only thing I have in mind is, what would the probable output look like on a white background? It would be a bummer if we refactor everything and realize it looks bad on a white background regardless :)