docs file to demo all available ANSI colours
docs file to demo all available ANSI colours

Use hard-coded escape sequence \e[a;;f;bm to generate colors, where
'a' is an attribute, 'f' is the foreground colour, 'b' is the
background colour.

'a' is 1 - bright, 2 - dim, 3 - xx, 4 - underlined,
       5 - blink, 6 - xx, 7 - reverse, 8 - hidden

'f' is 30 - black, 31 - red, 32 - green, 33 - yellow,
       34 - blue, 35 - magenta, 36 - cyan, 37 - gray

'b' is 40 - black, 41 - red, 42 - green, 43 - yellow,
       44 - blue, 45 - magenta, 46 - cyan, 47 - gray

legrady/bash-colour