Question: How to re-define 16 base colors via command line?

[fooness]

This is not an issue with theme.sh, but a mere “how to” question as I did not succeed in finding any documentation.

Hello everyone. For quite some days I am trying to re-define the 16 base colors, set via e.g. my terminal emulator, via the command line (only) inside the currently active shell/session. Unfortunately, after lots of searching, reading, trying, and failing, I still did not succeed with this simple(?) task.

Yesterday I stumbled upon theme.sh and read through the source code, especially the apply_theme() function should be interesting with regards to my question, but I’m still a bit lost due to the many substitutions going on there.

Hence, may I ask you to please provide one, two, or three easy examples on how to re-define one of the 16 base colors?

I did succeed in changing the default foreground color via e.g. printf "\e[38;2;${r};${g};${b}m%s\e\\" "…" where ${r} ${g} ${b} are RGB values calculated from a hex color definition like #ffffff or #000000 et cetera.

How would I re-define e.g. the color black, i.e. \e[30 or bold/bright black (grey), i.e. \e[1;30 or \e[90 for my current shell/session? Thank you so much for hopefully explaining a little bit the approaches of and goings-on in your script.

I am on macOS, and I was testing my color re-definition approaches in iTerm, Terminal, and also tmux — it seems there’s differences for many terminal emulators. Also there seems to be a difference between the direction the bracket is facing in \e[ and \e] and for this I found even less documentation online.