colors.txt

Exhaustive colors info: https://en.wikipedia.org/wiki/ANSI_escape_code#Colors

\\e === ESC
Sequence: \\e[\e[36;1m<codes separated by ';'>\e[0mm
Reset all: \\e[0m
0    reset
1    \e[1mbold\e[0m
22   normal text; no longer bold or faint, keeps current color
4    \e[4munderline\e[0m
FG      BG      regular   bright
30	40	\e[30;47mBlack\e[0m     \e[30;1;47mBlack\e[0m
31	41	\e[31mRed\e[0m       \e[31;1mRed\e[0m
32	42	\e[32mGreen\e[0m     \e[32;1mGreen\e[0m
33	43	\e[33mYellow\e[0m    \e[33;1mYellow\e[0m
34	44	\e[34mBlue\e[0m      \e[34;1mBlue\e[0m
35	45	\e[35mMagenta\e[0m   \e[35;1mMagenta\e[0m
36	46	\e[36mCyan\e[0m      \e[36;1mCyan\e[0m
37	47	\e[37;40mWhite\e[0m     \e[37;1;40mWhite\e[0m

Example: $ echo -e "\\e[1;35;42m Bold magenta on green background \\e[0m"
Becomes: \e[1;35;42m Bold magenta on green background \e[0m
Apparently non-standard but widely supported, these are brighter background colors:
\e[30;100m100\e[0m\e[30;101m101\e[0m\e[30;102m102\e[0m\e[30;103m103\e[0m\e[30;104m104\e[0m\e[30;105m105\e[0m\e[30;106m106\e[0m\e[30;107m107\e[0m

216 colors:
  \\e[38;5;\e[36;1mn\e[0mm where \e[36;1mn\e[0m comes from a color table: https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit
  \\e[48;5;\e[36;1mn\e[0mm for background
Orange: \e[38;5;208m\\e[38;5;208m\e[0m

Millions of colors:
  \\e[38;2;\e[36;1mr\e[0m;\e[36;1mg\e[0m;\e[36;1mb\e[0mm integer \e[36;1mrgb\e[0m values, foreground color
  \\e[48;2;\e[36;1mr\e[0m;\e[36;1mg\e[0m;\e[36;1mb\e[0mm integer \e[36;1mrgb\e[0m values, background color

Surround the escape sequences (start and end separately) with \[ ... \] to prevent their length from being counted in
  the prompt string length.