Shell script colours

bash_colours

## Colours and font styles
## Syntax: echo -e "${FOREGROUND_COLOUR}${BACKGROUND_COLOUR}${STYLE}Hello world!${RESET_ALL}"

# Escape sequence and resets
ESC_SEQ="\x1b["
RESET_ALL="${ESC_SEQ}0m"
RESET_BOLD="${ESC_SEQ}21m"
RESET_UL="${ESC_SEQ}24m"

# Foreground colours
FG_BLACK="${ESC_SEQ}30;"
FG_RED="${ESC_SEQ}31;"
FG_GREEN="${ESC_SEQ}32;"
FG_YELLOW="${ESC_SEQ}33;"
FG_BLUE="${ESC_SEQ}34;"
FG_MAGENTA="${ESC_SEQ}35;"
FG_CYAN="${ESC_SEQ}36;"
FG_WHITE="${ESC_SEQ}37;"
FG_BR_BLACK="${ESC_SEQ}90;"
FG_BR_RED="${ESC_SEQ}91;"
FG_BR_GREEN="${ESC_SEQ}92;"
FG_BR_YELLOW="${ESC_SEQ}93;"
FG_BR_BLUE="${ESC_SEQ}94;"
FG_BR_MAGENTA="${ESC_SEQ}95;"
FG_BR_CYAN="${ESC_SEQ}96;"
FG_BR_WHITE="${ESC_SEQ}97;"

# Background colours (optional)
BG_BLACK="40;"
BG_RED="41;"
BG_GREEN="42;"
BG_YELLOW="43;"
BG_BLUE="44;"
BG_MAGENTA="45;"
BG_CYAN="46;"
BG_WHITE="47;"

# Font styles
FS_REG="0m"
FS_BOLD="1m"
FS_UL="4m"

Awesome - that's the first one that works for me in both linux and OSX! Would have loved to vote you up on stack overflow, but am having insufficient reputation points...

This rocks. Still using it today. Thanks for putting this together.

I don't believe this works as intended.
If, as per the usage example, you say:

echo -e "${FG_RED}${BG_CYAN}{FS_REG} hello world ${RESET_ALL}

then no style gets applied at all. The reason is that FS_REG causes all attributes, including colours, to be reset.
It will work as intended with this correction:

FS_REG="21;24m"

@woolinsilver Good catch! Thank you!

Does this work with printf? and if so, syntax example? Would like to use it with printfs column printing facilities.

@danielloader You can just use it on the first printf string since it escapes chars by default.

I have made something a bit different that supports each setting by itself and runs even on busybox/ash:
https://gist.github.com/tavinus/925c7c9e67b5ba20ae38637fd0e06b07
The script also prints examples for all vars defined.
(there is a commented line with a printf example there as well)