How to create a testcolor.sh like the following screenshot?

Question

I found this image on the internet, but don't know how was it made,

Can anyone provide a sample on that? I just would like to have a color table as well.

Answer 1

install the package named as:

colortest

and enjoy coloring by running the binaries like colortest-8 colortest-16 colortest-16b and so on

Answer 2

There are a few variations, well six to be precise, listed on the Arch Wiki Xresouces page.

As well as the one that is used in your screenshot, there are some more inventive ones—my favourite of which is from the Crunchbang forums and features space invaders:

#!/bin/bash
#
# ANSI color scheme script featuring Space Invaders
#
# Original: http://crunchbanglinux.org/forums/post/126921/#p126921
# Modified by lolilolicon
#

f=3 b=4
for j in f b; do
  for i in {0..7}; do
    printf -v $j$i %b "\e[${!j}${i}m"
  done
done
bld=$'\e[1m'
rst=$'\e[0m'

cat << EOF

 $f1  ▀▄   ▄▀     $f2 ▄▄▄████▄▄▄    $f3  ▄██▄     $f4  ▀▄   ▄▀     $f5 ▄▄▄████▄▄▄    $f6  ▄██▄  $rst
 $f1 ▄█▀███▀█▄    $f2███▀▀██▀▀███   $f3▄█▀██▀█▄   $f4 ▄█▀███▀█▄    $f5███▀▀██▀▀███   $f6▄█▀██▀█▄$rst
 $f1█▀███████▀█   $f2▀▀███▀▀███▀▀   $f3▀█▀██▀█▀   $f4█▀███████▀█   $f5▀▀███▀▀███▀▀   $f6▀█▀██▀█▀$rst
 $f1▀ ▀▄▄ ▄▄▀ ▀   $f2 ▀█▄ ▀▀ ▄█▀    $f3▀▄    ▄▀   $f4▀ ▀▄▄ ▄▄▀ ▀   $f5 ▀█▄ ▀▀ ▄█▀    $f6▀▄    ▄▀$rst

 $bld$f1▄ ▀▄   ▄▀ ▄   $f2 ▄▄▄████▄▄▄    $f3  ▄██▄     $f4▄ ▀▄   ▄▀ ▄   $f5 ▄▄▄████▄▄▄    $f6  ▄██▄  $rst
 $bld$f1█▄█▀███▀█▄█   $f2███▀▀██▀▀███   $f3▄█▀██▀█▄   $f4█▄█▀███▀█▄█   $f5███▀▀██▀▀███   $f6▄█▀██▀█▄$rst
 $bld$f1▀█████████▀   $f2▀▀▀██▀▀██▀▀▀   $f3▀▀█▀▀█▀▀   $f4▀█████████▀   $f5▀▀▀██▀▀██▀▀▀   $f6▀▀█▀▀█▀▀$rst
 $bld$f1 ▄▀     ▀▄    $f2▄▄▀▀ ▀▀ ▀▀▄▄   $f3▄▀▄▀▀▄▀▄   $f4 ▄▀     ▀▄    $f5▄▄▀▀ ▀▀ ▀▀▄▄   $f6▄▀▄▀▀▄▀▄$rst


                                     $f7▌$rst

                                   $f7▌$rst

                              $f7    ▄█▄    $rst
                              $f7▄█████████▄$rst
                              $f7▀▀▀▀▀▀▀▀▀▀▀$rst

EOF

Answer 3

The escape sequence ESC [ SPEC1 ; … m changes the text attributes (color, bold, etc.) of subsequently written characters. This is one of the ANSI terminal escape sequences. Each SPEC can be one of the following (the list is not exhaustive):

• 0 to switch to the default colors.
• 1 to turn boldface on.
• 30 through 37 to set the foreground color (black, red, green, yellow, blue, magenta, cyan, gray).
• 40 through 47 to set the background color (same list).

Here's a shell snippet that outputs almost what you posted.

printf "             "
for b in 0 1 2 3 4 5 6 7; do printf "   4${b}m  "; done
echo
for f in "" 30 31 32 33 34 35 36 37; do
  for s in "  " "1;"; do
    printf "%4sm" "${s}${f}"
    printf "   \033[%sm%s\033[0m  " "$s$f" "gYw"
    for b in 0 1 2 3 4 5 6 7; do
      printf "   \033[4%s;%sm%s\033[0m  " $b $s$f "gYw"
    done
    echo
  done
done

Answer 4

echo -e "\n\033[4;31mLight Colors\033[0m \t\t\t  \033[1;4;31mDark Colors\033[0m"
echo -e " \e[0;30;47m Black     \e[0m   0;30m \t\t \e[1;30;40m Dark Gray   \e[0m  1;30m"
echo -e " \e[0;31;47m Red       \e[0m   0;31m \t\t \e[1;31;40m Dark Red    \e[0m  1;31m"
echo -e " \e[0;32;47m Green     \e[0m   0;32m \t\t \e[1;32;40m Dark Green  \e[0m  1;32m"
echo -e " \e[0;33;47m Brown     \e[0m   0;33m \t\t \e[1;33;40m Yellow      \e[0m  1;33m"
echo -e " \e[0;34;47m Blue      \e[0m   0;34m \t\t \e[1;34;40m Dark Blue   \e[0m  1;34m"
echo -e " \e[0;35;47m Magenta   \e[0m   0;35m \t\t \e[1;35;40m Dark Magenta\e[0m  1;35m"
echo -e " \e[0;36;47m Cyan      \e[0m   0;36m \t\t \e[1;36;40m Dark Cyan   \e[0m  1;36m"
echo -e " \e[0;37;47m Light Gray\e[0m   0;37m \t\t \e[1;37;40m White       \e[0m  1;37m"

and so on.