Install Monokai Theme on Terminal with prompt colors, etc.?
See this answer on the Unix &amp; Linux SE. There are a number of additional colors that can be used in a 256 color terminal.

You can view the colors in Terminal, and see their codes, by running this bash script. (There is a also a color chart in the above linked post, or IMO a more readable chart here.)

#!/bin/bash

color=16;

while [ $color -lt 245 ]; do
    echo -e "$color: \\033[38;5;${color}mhello\\033[48;5;${color}mworld\\033[0m"
    ((color++));
done


Once you determine the colors you want, and have the color codes, you can use them in a PS1 prompt like shown below.

48;5;# where # is the color number you want, sets the background color.

38;5;# again # replaced with the color number, sets the foreground color.

In my case I wanted the default background that Terminal set when it was launched, and I use 0 to note this. (You can also see that toward the end of the sequence \[\e[0m\] - same idea, using 0 to reset everything to the default.)

export PS1='\[\e[0;38;5;166m\]\u@\H\[\e[0m\] \w $ '


The below screenshot shows my original, default prompt, and then how it looks when I sourced .bash_profile after defining PS1: