On 24Feb2020 15:43, Paul Gilmartin <paulgboul...@aim.com> wrote:
On 2020-02-24, at 14:40:52, Cameron Simpson wrote:
On 24Feb2020 13:55, Paul Gilmartin wrote:
With my failing eyes, I'd like everything high contrast,
mostly black on white.
What's the natural colour scheme of your terminal?
Foreground black; background white.
When I do in .mutt/muttrc
color normal black white
... I seem to get black on gray.
Odd. What about other colours than "white", as a test?
E.g. brightyellow works. brightwhite is whiter than white,
but still somewhat gray. Is there something like #FFF?
Is there a "realwhite"?
When I do:
color normal white black
... I get white (or maybe gray) on black.
What if you switch out "white" for "default"?
Ah! "color normal default default" works. "default" is
whiter than white. Who woulda thunk it.
Where should I have found this in the Ref.?
Maybe nowhere, though it could probably use some discussion there.
The colours are requested with escape sequences and the colour displayed
are thus dependent on your terminal emulator; the names "white" etc map
to a palette. So you want to start with the settings in your terminal
emulator.
For reference, here are some colours from my ancient ANSI colour python
module, where you can see 0, 7, 4 etc embedded.
# the known colour names and their escape sequences
COLOURS = {
'normal': '\033[0m',
'reverse': '\033[7m',
'underline': '\033[4m',
'bold': '\033[1m',
'black': '\033[30m',
'red': '\033[31m',
'green': '\033[32m',
'yellow': '\033[33m',
'blue': '\033[34m',
'magenta': '\033[35m',
'cyan': '\033[36m',
'white': '\033[37m',
}
That palette used to be about 8 colours, then there were terminals with
256 colours (eg support from things like xterm-256) and maybe there's an
arbitrary #RGB format these days.
I also attach my script "colour_echo" and the "with-colour" script it
calls. Usage:
colour_echo white message...
which you might use to fiddle around with the standard colour names to
see what your terminal produces.
I'd be happy to be further educated about modern colour escape
sequences.
Cheers,
Cameron Simpson <c...@cskk.id.au>
#!/bin/sh
#
# Perform command with output in particular colour.
# - Cameron Simpson <c...@cskk.id.au> 08jul2007
#
set -ue
: ${WITH_COLOUR_ON:=''}
cmd=$0
usage="Usage: $cmd colour command [args...]"
badopts=
if [ $# = 0 ]
then
echo "$cmd: missing colour" >&2
badopts=1
else
colour=$1
shift
if [ $# = 0 ]
then
echo "$cmd: missing command" >&2
badopts=1
fi
fi
[ $badopts ] && { echo "$usage" >&2; exit 2; }
exec 3>&2 2>/dev/null
on= off=
case $colour in
normal) on= ;;
bold) on=`tput bold`&& off=`tput sgr0` ;;
reverse) on=`tput rev` && off=`tput sgr0` ;;
standout) on=`tput smso` && off=`tput rmso` ;;
it|italic)on=`tput sitm` && off=`tput ritm` ;;
ul|underline)
on=`tput smul` && off=`tput rmul` ;;
sl|status)on=`tput tsl` && off=`tput fsl` ;;
black) on=`tput setaf 0 || tput setaf 0 0 0 || tput setf 0` ;;
red) on=`tput setaf 1 || tput setaf 1 0 0 || tput setf 4` ;;
green) on=`tput setaf 2 || tput setaf 2 0 0 || tput setf 2` ;;
yellow) on=`tput setaf 3 || tput setaf 3 0 0 || tput setf 6` ;;
blue) on=`tput setaf 4 || tput setaf 4 0 0 || tput setf 1` ;;
magenta) on=`tput setaf 5 || tput setaf 5 0 0 || tput setf 5` ;;
cyan) on=`tput setaf 6 || tput setaf 6 0 0 || tput setf 3` ;;
white) on=`tput setaf 7 || tput setaf 7 0 0 || tput setf 7` ;;
*) echo "$cmd: warning: unsupported colour: $colour" >&2 ;;
esac || on=
exec 2>&3 3>&-
# no "on" sequence? just run the command
[ -n "$on" ] || exec "$@"
# no "off"? restore original colour pair
[ -n "$off" ] || off=`tput op`
xit=0
printf "%s" "$on"
env "WITH_COLOUR_ON=$on" "$@" || xit=$?
printf "%s%s" "$off$WITH_COLOUR_ON"
exit $xit
#!/bin/sh
#
# Echo in colour. - Cameron Simpson <c...@cskk.id.au>
#
set -ue
cmd=$0
usage="Usage: $cmd [-n] colour message..."
badopts=
echo=echo
while [ $# -gt 0 ]
do
case $1 in
-n) echo=necho; shift ;;
--) shift; break ;;
-?*)echo "$cmd: unrecognised option: $1" >&2
badopts=1
;;
*) break ;;
esac
shift
done
if [ $# = 0 ]
then
echo "$cmd: missing colour" >&2
badopts=1
else
colour=$1
shift
fi
[ $badopts ] && { echo "$usage" >&2; exit 2; }
exec with-colour "$colour" "$echo" ${1+"$@"}
