• ansicolors
• xterm 256 colors
  • xterm 256 colors chart
  • 256 colors cheat sheet
• man page colors
  • settings
  • using vim as man pager
  • ansicolor issues in man page

[!TIP]

• foreground colors

  ┏━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━┓
  ┃ ### ┃ GNOME Terminal          ┃ xterm                   ┃ non-GUI TTY           ┃
  ┡━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━┩
  │  39 │ «reset this color»      │ «reset this color»      │ «reset this color»    │
  ├─────┼─────────────────────────┼─────────────────────────┼───────────────────────┤
  │  30 │ very dark grey          │ black                   │ black                 │
  │  31 │ dull red                │ red                     │ light red             │
  │  32 │ dull green              │ light green             │ light green           │
  │  33 │ dull yellow             │ yellow                  │ yellow                │
  │  34 │ greyish blue            │ dark blue               │ sky blue              │
  │  35 │ dull purple             │ purple                  │ purple                │
  │  36 │ teal                    │ cyan                    │ cyan                  │
  │  37 │ light grey              │ light grey              │ light grey            │
  ├─────┼─────────────────────────┼─────────────────────────┼───────────────────────┤
  │  90 │ dark grey               │ dull grey               │ dull grey             │
  │  91 │ red                     │ bright red              │ bright red            │
  │  92 │ lime green              │ bright green            │ bright green          │
  │  93 │ yellow                  │ bright yellow           │ pure yellow           │
  │  94 │ light greyish blue      │ dull blue               │ deep blue             │
  │  95 │ light purple            │ magenta                 │ magenta               │
  │  96 │ cyan                    │ bright cyan             │ bright cyan           │
  │  97 │ off white               │ white                   │ white                 │
  ├─────┴──────┬──────────────────┴─────────────────────────┴───────────────────────┤
  │ 38;2;ʀ;ɢ;ʙ │ replace ʀ, ɢ, and ʙ with RGB values from 0 to 255                  │
  │            │   for closest supported color (non-GUI TTY has only 16 colors!)    │
  │ 38;5;ɴ     │ replace ɴ with value from 256-color chart below                    │
  │            │   for closest supported color (non-GUI TTY has only 16 colors!)    │
  └────────────┴────────────────────────────────────────────────────────────────────┘
  

• background colors

  ┏━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━┓
  ┃ ### ┃ GNOME Terminal          ┃ xterm                   ┃ non-GUI TTY           ┃
  ┡━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━┩
  │  49 │ «reset this color»      │ «reset this color»      │ «reset this color»    │
  ├─────┼─────────────────────────┼─────────────────────────┼───────────────────────┤
  │  40 │ very dark grey          │ black                   │ black                 │
  │  41 │ dull red                │ red                     │ light red             │
  │  42 │ dull green              │ light green             │ light green           │
  │  43 │ dull yellow             │ yellow                  │ yellow                │
  │  44 │ greyish blue            │ dark blue               │ sky blue              │
  │  45 │ dull purple             │ purple                  │ purple                │
  │  46 │ teal                    │ cyan                    │ cyan                  │
  │  47 │ light grey              │ light grey              │ light grey            │
  ├─────┼─────────────────────────┼─────────────────────────┼╶╴╶╴╶╴╶╴╶╴╶╴╶╴╶╴╶╴╶╴╶╴╶┤
  │ 100 │ dark grey               │ dull grey               │ black                 │
  │ 101 │ red                     │ bright red              │ light red             │
  │ 102 │ lime green              │ bright green            │ light green           │
  │ 103 │ yellow                  │ bright yellow           │ yellow                │
  │ 104 │ light greyish blue      │ dull blue               │ sky blue              │
  │ 105 │ light purple            │ magenta                 │ purple                │
  │ 106 │ cyan                    │ bright cyan             │ cyan                  │
  │ 107 │ off white               │ white                   │ light grey            │
  ├─────┴──────┬──────────────────┴─────────────────────────┴───────────────────────┤
  │ 48;2;ʀ;ɢ;ʙ │ replace ʀ, ɢ, and ʙ with RGB values from 0 to 255                  │
  │            │   for closest supported color (non-GUI TTY has only 8 colors!)     │
  │ 48;5;ɴ     │ replace ɴ with value from 256-color chart below                    │
  │            │   for closest supported color (non-GUI TTY has only 8 colors!)     │
  └────────────┴────────────────────────────────────────────────────────────────────┘
  

• text styling

  ┏━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━┓
  ┃ ### ┃ GNOME Terminal          ┃ xterm                   ┃ non-GUI TTY           ┃
  ┡━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━┩
  │     │ «reset style+colors»    │ «reset style+colors»    │ «reset style+colors»  │
  │   0 │ «reset style+colors»    │ «reset style+colors»    │ «reset style+colors»  │
  ├─────┼─────────────────────────┼─────────────────────────┼───────────────────────┤
  │   1 │ +bold, +brighter color  │ +bold, +brighter color  │ +brighter color,      │
  │     │                         │                         │   -forced grey        │
  │   2 │ +fainter color          │ +fainter color          │ +forced grey          │
  │   3 │ +italic                 │ +italic                 │ +forced green         │
  │     │                         │                         │   ● overrides 2 and 4 │
  │   4 │ +underline              │ +underline              │ +forced cyan          │
  │     │                         │                         │   ● overrides 2       │
  │   5 │ «no effect»             │ +blink                  │ «no effect»           │
  │   7 │ +invert colors          │ +invert colors          │ +invert colors        │
  │   8 │ +invisible              │ +invisible              │ «no effect»           │
  │     │                         │   ● underline appears   │                       │
  │   9 │ +strikethrough          │ +strikethrough          │ «no effect»           │
  ├─────┼─────────────────────────┤                         ├───────────────────────┤
  │  21 │ -bold, -brighter color, │ +double underline       │ -brighter color,      │
  │     │   -fainter color        ├─────────────────────────┤   -forced grey        │
  │  22 │ -bold, -brighter color, │ -bold, -brighter color, │ -brighter color,      │
  │     │   -fainter color        │   -fainter color        │   -forced grey        │
  │  23 │ -italic                 │ -italic                 │ -forced green         │
  │  24 │ -underline              │ -underline,             │ -forced cyan          │
  │     │                         │   -double underline     │                       │
  │  25 │ «no effect»             │ -blink                  │ «no effect»           │
  │  27 │ -invert colors          │ -invert colors          │ -invert colors        │
  │  28 │ -invisible              │ -invisible              │ «no effect»           │
  │  29 │ -strikethrough          │ -strikethrough          │ «no effect»           │
  └─────┴─────────────────────────┴─────────────────────────┴───────────────────────┘
  

• Font Effects

  ┏━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
  ┃   Code  ┃            Effect            ┃                            Note                                        ┃
  ┡━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
  │    0    │ Reset / Normal               │ all attributes off                                                     │
  │    1    │ Bold or increased intensity  │                                                                        │
  │    2    │ Faint (decreased intensity)  │ Not widely supported.                                                  │
  │    3    │ Italic                       │ Not widely supported. Sometimes treated as inverse.                    │
  │    4    │ Underline                    │                                                                        │
  │    5    │ Slow Blink                   │ less than 150 per minute                                               │
  │    6    │ Rapid Blink                  │ MS-DOS ANSI.SYS; 150+ per minute; not widely supported                 │
  │    7    │ [[reverse video]]            │ swap foreground and background colors                                  │
  │    8    │ Conceal                      │ Not widely supported.                                                  │
  │    9    │ Crossed-out                  │ Characters legible, but marked for deletion. Not widely supported.     │
  │    10   │ Primary(default) font        │                                                                        │
  │  11–19  │ Alternate font               │ Select alternate font n-10                                             │
  │    20   │ Fraktur                      │ hardly ever supported                                                  │
  │    21   │ Bold off or Double Underline │ Bold off not widely supported; double underline hardly ever supported. │
  │    22   │ Normal color or intensity    │ Neither bold nor faint                                                 │
  │    23   │ Not italic, not Fraktur      │                                                                        │
  │    24   │ Underline off                │ Not singly or doubly underlined                                        │
  │    25   │ Blink off                    │                                                                        │
  │    27   │ Inverse off                  │                                                                        │
  │    28   │ Reveal                       │ conceal off                                                            │
  │    29   │ Not crossed out              │                                                                        │
  │  30–37  │ Set foreground color         │ See color table below                                                  │
  │    38   │ Set foreground color         │ Next arguments are 5;<n> or 2;<r>;<g>;<b>, see below                   │
  │    39   │ Default foreground color     │ implementation defined (according to standard)                         │
  │  40–47  │ Set background color         │ See color table below                                                  │
  │    48   │ Set background color         │ Next arguments are 5;<n> or 2;<r>;<g>;<b>, see below                   │
  │    49   │ Default background color     │ implementation defined (according to standard)                         │
  │    51   │ Framed                       │                                                                        │
  │    52   │ Encircled                    │                                                                        │
  │    53   │ Overlined                    │                                                                        │
  │    54   │ Not framed or encircled      │                                                                        │
  │    55   │ Not overlined                │                                                                        │
  │    60   │ ideogram underline           │ hardly ever supported                                                  │
  │    61   │ ideogram double underline    │ hardly ever supported                                                  │
  │    62   │ ideogram overline            │ hardly ever supported                                                  │
  │    63   │ ideogram double overline     │ hardly ever supported                                                  │
  │    64   │ ideogram stress marking      │ hardly ever supported                                                  │
  │    65   │ ideogram attributes off      │ reset the effects of all of 60-64                                      │
  │  90–97  │ Set bright foreground color  │ aixterm (not in standard)                                              │
  │ 100–107 │ Set bright background color  │                                                                        │
  └─────────┴──────────────────────────────┴────────────────────────────────────────────────────────────────────────┘
  

• quick show colors:

  $ for i in {0..255}; do echo -e "\033[38;5;${i}m $i \033[0m"; done
  

ansicolors

[!NOTE] references:

• How to have multiple colors in a Windows batch file?

• 256 colors

  function 256color() {
    for i in {0..255}; do
      echo -e "\e[38;05;${i}m█${i}";
    done | column -c 180 -s ' '; echo -e "\e[m"
  }
  

  

  #!/bin/bash
  
  # This program is free software. It comes without any warranty, to
  # the extent permitted by applicable law. You can redistribute it
  # and/or modify it under the terms of the Do What The Fuck You Want
  # To Public License, Version 2, as published by Sam Hocevar. See
  # http://sam.zoy.org/wtfpl/COPYING for more details.
  
  for fgbg in 38 48 ; do # Foreground / Background
      for color in {0..255} ; do # Colors
          # Display the color
          printf "\e[${fgbg};5;%sm  %3s  \e[0m" $color $color
          # Display 6 colors per lines
          if [ $((($color + 1) % 6)) == 4 ] ; then
              echo # New line
          fi
      done
      echo # New line
  done
  exit 0
  

  

• colors and formatting

  reference:

  • 256-colors.sh

  #!/bin/sh
  
  # From: https://misc.flogisoft.com/bash/tip_colors_and_formatting#colors2
  # Modified by steve.tarver@gmail.com to work in Alpine Linux ash
  
  # This program is free software. It comes without any warranty, to
  # the extent permitted by applicable law. You can redistribute it
  # and/or modify it under the terms of the Do What The Fuck You Want
  # To Public License, Version 2, as published by Sam Hocevar. See
  # http://sam.zoy.org/wtfpl/COPYING for more details.
  
  #Background
  for clbg in {40..47} {100..107} 49 ; do
    #Foreground
    for clfg in {30..37} {90..97} 39 ; do
      #Formatting
      for attr in 0 1 2 4 5 7 ; do
        #Print the result
        echo -en "\e[${attr};${clbg};${clfg}m ^[${attr};${clbg};${clfg}m \e[0m"
      done
      echo #Newline
    done
  done
  exit 0
  

  

  for attr in 0 1 2 3 4 5 6 7; do
    echo "------------------------------------------------"
    printf "ESC[%s;Foreground;Background - \n" $attr
    for fore in 30 31 32 33 34 35 36 37; do
        for back in 40 41 42 43 44 45 46 47; do
            printf '\033[%s;%s;%sm %02s;%02s\033[0m' $attr $fore $back $fore $back
        done
    printf '\n'
    done
    printf '\033[0m'
  done
  

  

• solarized color

  #!/bin/bash
  
  # solarized ansicolors (exporting for grins)
  export base03='\033[0;30;40m'
  export base02='\033[1;30;40m'
  export base01='\033[0;32;40m'
  export base00='\033[0;33;40m'
  export base0='\033[0;34;40m'
  export base1='\033[0;36;40m'
  export base2='\033[0;37;40m'
  export base3='\033[1;37;40m'
  export yellow='\033[1;33;40m'
  export orange='\033[0;31;40m'
  export red='\033[1;31;40m'
  export magenta='\033[1;35;40m'
  export violet='\033[0;35;40m'
  export blue='\033[1;34;40m'
  export cyan='\033[1;36;40m'
  export green='\033[1;32;40m'
  export reset='\033[0m'
  
  colors () {
    echo -e "base03  ${base03}Test$reset"
    echo -e "base02  ${base02}Test$reset"
    echo -e "base01  ${base01}Test$reset"
    echo -e "base00  ${base00}Test$reset"
    echo -e "base0   ${base0}Test$reset"
    echo -e "base1   ${base1}Test$reset"
    echo -e "base2   ${base2}Test$reset"
    echo -e "base3   ${base3}Test$reset"
    echo -e "yellow  ${yellow}Test$reset"
    echo -e "orange  ${orange}Test$reset"
    echo -e "red     ${red}Test$reset"
    echo -e "magenta ${magenta}Test$reset"
    echo -e "violet  ${violet}Test$reset"
    echo -e "blue    ${blue}Test$reset"
    echo -e "cyan    ${cyan}Test$reset"
    echo -e "green   ${green}Test$reset"
  }
  colors
  

  

xterm 256 colors

[!TIP]

• Web colors

• blue

• brown

• cyan

• gray.black

• green

• orange

• pink

• purple.magenta

• red

• white

• yellow

xterm 256 colors chart

256 colors cheat sheet

man page colors

settings

• printf

  # The color of man page
  export LESS_TERMCAP_mb=$(printf "\\e[1;31m")         # begin blinding
  export LESS_TERMCAP_md=$(printf "\\e[1;31m")         # begin bold
  export LESS_TERMCAP_me=$(printf "\\e[0m")            # end mode
  export LESS_TERMCAP_se=$(printf "\\e[0m")            # end stadout-mode
  export LESS_TERMCAP_so=$(printf "\\e[1;44;33m")      # begin stadout-mode - info box
  export LESS_TERMCAP_so=$(printf "\\e[1;33m")      # begin stadout-mode - info box
  export LESS_TERMCAP_ue=$(printf "\\e[0m")            # end underline
  export LESS_TERMCAP_us=$(printf "\\e[1;32m")         # begin underline
  export GROFF_NO_SGR=1         # For Konsole and Gnome-terminal
  export LESS='-eirMXR'
  export SYSTEMD_LESS=FRXMK
  export MANPAGER='less -s -M +Gg'
  

• tput

  export LESS_TERMCAP_mb=$(tput bold; tput setaf 2) # green
  export LESS_TERMCAP_md=$(tput bold; tput setaf 6) # cyan
  export LESS_TERMCAP_me=$(tput sgr0)
  export LESS_TERMCAP_so=$(tput bold; tput setaf 3; tput setab 4) # yellow on blue
  export LESS_TERMCAP_se=$(tput rmso; tput sgr0)
  export LESS_TERMCAP_us=$(tput smul; tput bold; tput setaf 7) # white
  export LESS_TERMCAP_ue=$(tput rmul; tput sgr0)
  export LESS_TERMCAP_mr=$(tput rev)
  export LESS_TERMCAP_mh=$(tput dim)
  export LESS_TERMCAP_ZN=$(tput ssubm)
  export LESS_TERMCAP_ZV=$(tput rsubm)
  export LESS_TERMCAP_ZO=$(tput ssupm)
  export LESS_TERMCAP_ZW=$(tput rsupm)
  export GROFF_NO_SGR=1         # For Konsole and Gnome-terminal
  

• $'\e'

  export LESS_TERMCAP_mb=$'\e[01;31m'       # begin blinking
  export LESS_TERMCAP_md=$'\e[01;37m'       # begin bold
  export LESS_TERMCAP_me=$'\e[0m'           # end all mode like so, us, mb, md, mr
  export LESS_TERMCAP_se=$'\e[0m'           # end standout-mode
  export LESS_TERMCAP_so=$'\e[45;93m'       # start standout mode
  export LESS_TERMCAP_ue=$'\e[0m'           # end underline
  export LESS_TERMCAP_us=$'\e[4;93m'        # start underlining
  

using vim as man pager

[!TIP]

• Using vim as a man-page viewer under Unix

export PAGER="/bin/sh -c \"unset PAGER;col -b -x | \
    vim -R -c 'set ft=man nomod nolist' -c 'map q :q<CR>' \
    -c 'map <SPACE> <C-D>' -c 'map b <C-U>' \
    -c 'nmap K :Man <C-R>=expand(\\\"<cword>\\\")<CR><CR>' -\""

ansicolor issues in man page

• error

  1mNAME0m       <-- BAD
         man - an interface to the on-line reference manuals
  
  1mSYNOPSIS0m   <-- BAD
         1mman  22m[1m-C  4m22mfile24m]  [1m-d22m]  [1m-D22m]  <-- BAD
  

• solution

  $ yum install man-pages man-db man
  
  # or
  $ sudo yum update man-pages man-db man