bluebanged by using Emacs on the tty

[amadalusia]

What happened?

When using Emacs on non-GUI mode, it doesn't set the color for the background correctly and it sets the background to a blue color.

This only happens on the TTY (I had to use fbcat and some NetPBM viewer to capture this..)

[NamesCode]

Huh this is really odd, can you give information about the enviroment your running this in?

[amadalusia]

I was running this on NixOS 24.05 with emacsPackages.catppuccin using the emacs-unstable package on emacs-overlay, and I was using the Frappé palette. I think thats about as much as I can get into without pointing out stuff that is irrelevant to the issue.

[jtbx]

I can reproduce this, I'll look into it later

[LeoAdL]

I had the same issue with Windows Terminal: turned out it was by default using only 256 colors... Switching to 24 bits colors as described here microsoft/terminal#6087 fixed the issue.

So this might just be related to using just 256 colors instead of the full 24 bits range.

[jtbx]

Hmm alright, I think it might be related to the function catppuccin-quantize-color

[LeoAdL]

Great explanation of the mechanics: https://chadaustin.me/2024/01/truecolor-terminal-emacs/ Probably the dark violet background of catppuccin get translated to dark blue rather than black in 256 colors.

[amadalusia]

Interesting, I might have been using a 16 bit color TTY since for me it appeared to be light blue...