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Colors on TTY (v26)

From: Aleksey Midenkov
Subject: Colors on TTY (v26)
Date: Sun, 31 Mar 2019 11:22:59 +0300

Trial and error shown that emacs holds special knowledge on terminal names:
f.ex. "xterm-something" works as 256 colors and "xterm2" works as 16
colors. This is in fact very strange because there are terminals like
So it's not good to hold special magic about term names for that. Why it
doesn't check terminfo db for that (though it checks for 24bit as doc
states)? Looks like a bug to me.

To test it:
1. infocmp your current term into file;
2. rename file and rename term inside it;
3. tic renamed file;
4. set TERM to renamed term.

And voila: it's either 256 or 16 colors depending on term name!

Another bug:
always shows 16 colors from .emacs file (or from -f option). It detects 256
colors somehow later and then list-colors-display executed interactively
shows different result.

All the best,

Aleksey Midenkov

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