Customize Color for lstset morekeywords

Question

I have done some extensive searching and have yet to find the answer to changing the color for lstset morekeywords. I want them to be a different color than my regular keywords. Here is what I have right now:

\documentclass{article}

\usepackage{listings,lstautogobble}
\usepackage[usenames,dvipsnames]{color}

% Custom Python Syntax
\lstset
{
    basicstyle=\small\ttfamily,
    commentstyle=\color{Green},
    keywordstyle=\color{Cerulean},
    frame=single,
    language=python,
    morekeywords={True, False},
    numbers=left,
    numbersep=10pt,
    numberstyle=\footnotesize\color{Gray},
    showstringspaces=false,
    stringstyle=\color{Mulberry},
    tabsize=3,
}

% Color Numbers
\lstset
{
    literate=%
    {0}{{{\color{Orange}0}}}1
    {1}{{{\color{Orange}1}}}1
    {2}{{{\color{Orange}2}}}1
    {3}{{{\color{rOrange}3}}}1
    {4}{{{\color{Orange}4}}}1
    {5}{{{\color{Orange}5}}}1
    {6}{{{\color{Orange}6}}}1
    {7}{{{\color{Orange}7}}}1
    {8}{{{\color{Orange}8}}}1
    {9}{{{\color{Orange}9}}}1
}

\begin{document}

    % A basic function that tests if a number is prime
    \lstinputlisting{isPrime.py}

\end{document}

Which produces the following result

As you can see on lines 16 and 17 True and False are the same color as return and right next to each other. I am just wondering if I could just change the color of selected keywords. For instance changing True and False to a darker blue or another color entirely.

Also: This is less of a concern but is there a better way to change the color of the numbers (not the line numbers, the numbers in the code)? What I have clearly works but I feel like it's a little inefficient.

Answer 1

You need to set the classoffset before you define the morekeywords. The specifications below say that True should be in WildStrawberry and False in LimeGreen:

Here is hack of your customisation:

% Custom Python Syntax
\lstset
{
    basicstyle=\small\ttfamily,
    commentstyle=\color{Green},
    frame=single,
    language=python,
    numbers=left,
    numbersep=10pt,
    numberstyle=\footnotesize\color{Gray},
    showstringspaces=false,
    stringstyle=\color{Mulberry},
    otabsize=3,
    % the more interesting/new bits
    classoffset=1,% starting a new class
    morekeywords={True},
    keywordstyle=\color{WildStrawberry},
    classoffset=2,% starting another class
    morekeywords={False},
    keywordstyle=\color{LimeGreen},
    classoffset=0,% restore to default class if more customisations...
}