Change the colors used in pgf-umlcd

Question

Is it possible to change the colors used in the pgf-umlcd package used to model UML class diagrams? The default yields a yellow background and a red border. However I'd like to use black and white diagrams (bg=white, border=black). It is probably possible by changing the tikz-settings, but I'm not familiar with that.

Example code:

\documentclass{article}
\usepackage{pgf-umlcd}
\begin{document}
\begin{tikzpicture}

    \begin{class}{MyClass}{0, 0}
        \operation{myMethod(arg : ArgClass)}
    \end{class}

\end{tikzpicture}
\end{document}

Answer 1

I found the answer by looking at the source-code at CTAN.

Change the text color:

\renewcommand{\umltextcolor}{black}

Change the border color:

\renewcommand{\umldrawcolor}{black}

Change the background color:

\renewcommand{\umlfillcolor}{white}