How do zsh ansi colour codes work?

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Running the following code in your terminal should tell you whether your terminal supports 256 colors.

for COLOR in {0..255} 
do
    for STYLE in "38;5"
    do 
        TAG="\033[${STYLE};${COLOR}m"
        STR="${STYLE};${COLOR}"
        echo -ne "${TAG}${STR}${NONE}  "
    done
    echo
done

it also shows you the code for each color in the form 38;5;x where x is the code for one of the 256 available colors.
Also, note that changing the "38;5" to "48;5" will show you the background color equivalent. You can then use any colors you like to make up the prompt as previously mentioned.

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