source color.sh

echo "This is ${pred}RED$preset."
echo "This is $(c IndianRed)Indian Red$preset."

1. Define c_truecolor to true or false. There is not (yet) any automatic detection to distinguish 8-bit (256) color terminals from 24-bit (16 million)¹. The Mac OS X system terminal lags behind most others in this respect². The default is true.
2. Optionally set X11_RGB_TXT to the full path of your rgb.txt such as provided with X11. If unset, defaults to /usr/share/X11/rgb.txt, or if that file is unreadable, to an rgb.txt provided with colors.sh.
3. Source color.sh.

printf "\x1b[38;2;255;100;0mTRUECOLOR\x1b[0m\n"

Please note the default MacOS terminal is anemic, and does not show colors as nicely as Linux or Windows.

echo "This is $pbold${pred}bold red$preset."
echo "This is $pitalic${pgreen}italic green$preset."

All predefined variables are prefixed with p, as in $pred or ${preset}.

To restore default text properties:

• reset

The basic ANSI 8 colors as foreground:

• black
• red
• green
• yellow
• blue
• magenta
• cyan
• white

The most supported ANSI text effects:

• bold
• light
• italic
• underscore
• blink
• reverse
• invisible
• strikethrough

cat <<EOM
Reds include:
* $(c IndianRed)Indian red$preset
* $(c OrangeRed)orange red$preset
* $(c VioletRed)violet red$preset
* $(c DarkRed)dark red$preset
EOM
echo "Or you can make $(c 210 30 30)your own red$preset."

Using an 24-bit color palette, and to a lesser degree 8-bit, you can use around 500 X11-defined colors by name, or provide your own RGB values.

• Terminal Colors

• Detect 24- vs 8-bit color. See Check if terminal supports 24-bit / true color
• Detect and handle non-color, e.g., output is not to a terminal.