Update of bug #64720 (project groff):
Status: None => Invalid
Assigned to: None => gbranden
Open/Closed: Open => Closed
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Follow-up Comment #2:
I agree with Dave. These selection of a color scheme with sufficient contrast
is the job of the document or the rendering environment (for example, a
terminal emulator).
The rendering environment can include the device, but it seems you're
complaining about the terminal device specifically. _groff_ supports only
ANSI X3.64/ECMA-48/ISO 6429 color names for terminals, of which there are are
eight, and _none_ of which have a prescribed value in any color space.
If the contrast of some of _groff_'s predefined color names is poor on some
other _groff_ output device, like PostScript or PDF, then that _might_ be an
issue worth reporting against the output driver's tmac file, such as
[https://git.savannah.gnu.org/cgit/groff.git/tree/tmac/ps.tmac?h=1.23.0#n137
ps.tmac]. On the other hand, contrast between some colors is always going to
be low or nonexistent, so please don't leap to report one without giving the
issue consideration first.
For example, I would expect the contrast between "slategray1" and "slategray2"
to be low anywhere.
The question of X11's blue color as a foregound on a black background has
[https://invisible-island.net/xterm/xterm.faq.html#dont_like_blue something of
a history], with which I am familiar. For a long time, Debian's xterm package
used "DodgerBlue" as its "ANSI" blue color. After I stopped maintaining xterm
for Debian, that decision got reverted, a poor usability decision.
I recommend use of "DodgerBlue" as blue to all users of terminal emulators
with dark backgrounds.
$ grep -i dodger ~/.Xresources
XTerm.*.VT100.Color4: dodgerBlue1
UXTerm.*.VT100.Color4: dodgerBlue1
Resolving as invalid. This matter is beyond the scope of things _groff_ can
control.
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