sliwowitz / bash-colors

Bash function to easily color/format text.

Bash Colors

🙈 KISS: See kiss-colors.sh for a simpler version 😉

Usage

$(c <flags>) inside an echo -e or printf
Or $(c) to reset

cecho <flags> <text> is a shortcut for echo -e "$(c <flags>)<text>$(c)"

Flags

 ┌───────┬────────────────┬─────────────────┐   ┌───────┬─────────────────┬───────┐
 │ Fg/Bg │ Color          │ Octal           │   │ Code  │ Style           │ Octal │
 ├───────┼────────────────┼─────────────────┤   ├───────┼─────────────────┼───────┤
 │  K/k  │ Black          │ \e[ + 3/4  + 0m │   │  s/S  │ Bold (strong)   │ \e[1m │
 │  R/r  │ Red            │ \e[ + 3/4  + 1m │   │  d/D  │ Dim             │ \e[2m │
 │  G/g  │ Green          │ \e[ + 3/4  + 2m │   │  i/I  │ Italic          │ \e[3m │
 │  Y/y  │ Yellow         │ \e[ + 3/4  + 3m │   │  u/U  │ Underline       │ \e[4m │
 │  B/b  │ Blue           │ \e[ + 3/4  + 4m │   │  f/F  │ Blink (flash)   │ \e[5m │
 │  M/m  │ Magenta        │ \e[ + 3/4  + 5m │   │  n/N  │ Negative        │ \e[7m │
 │  C/c  │ Cyan           │ \e[ + 3/4  + 6m │   │  h/H  │ Hidden          │ \e[8m │
 │  W/w  │ White          │ \e[ + 3/4  + 7m │   │  t/T  │ Strikethrough   │ \e[9m │
 ├───────┴────────────────┴─────────────────┤   ├───────┼─────────────────┼───────┤
 │  High intensity        │ \e[ + 9/10 + *m │   │   0   │ Reset           │ \e[0m │
 └────────────────────────┴─────────────────┘   └───────┴─────────────────┴───────┘
                                                 Uppercase = Reset a style: \e[2*m

The single parameter of the function is composed of one or several 1-character flags.
By convention in this order: reset, formats, foreground, background.
Or in regex language: 0?S?[sdiufn-]*[KRGYBMCW]?[krgybmcw]?

Remarks

• Reset must come before the others… or it will undo immediately the formatting! So $(c 0s) and not $(c s0).
• @TODO: h for high intensity is not yet implemented.
• Quite slow 😞

Examples

• printf "$(c sW)Bold white$(c) and normal"
• echo -e "Normal text… $(c sRy)BOLD red text on yellow background… $(c w)now on white background… $(c 0u) reset and underline… $(c) and back to normal."
• cecho Wb "White text on blue background"

References:

• Bash tips: Colors and formatting (ANSI/VT100 Control sequences)
• Very complete explanations on StackOverflow
• Coloring functions

License

Licensed under the MIT License.