\documentclass{ppex}
\nonstopmode
\usepackage {graphicx}
\pagestyle{empty}
\setlength\textwidth{207.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {graphicx}
\setlength{\fboxsep}{0mm}
\providecommand{\HR}{\rule{1em}{0.4pt}}
\HR\fbox{\rotatebox{45}{%
   \fbox{\parbox{3em}%
      {Red\\Green\\Blue}}}}\HR
\HR\fbox{\rotatebox{45}{%
   \fbox{\parbox[t]{3em}%
      {Red\\Green\\Blue}}}}\HR
\HR\fbox{\rotatebox{45}{%
   \fbox{\parbox[b]{3em}%
      {Red\\Green\\Blue}}}}\HR
\end{document}