Colored Thesis

% PhD thesis template
% © Jan-Philipp Kappmeier, Apache License 2.0
\documentclass{standalone}

% Include the thesis parameters with data for the cover pages
\input{../thesisproperties}

% Include the page size definitions
\input{definitions}

\thispagestyle{empty}

\begin{document}

  \begin{tikzpicture}[outer sep=1.5mm]
    \useasboundingbox (-\pagewidth-\backwidth,0mm) rectangle (-\pagewidth-\backwidth-\pagewidth,\pageheight);

    % Filled background
    \fill[gray] (-\pagewidth-\backwidth,0mm) rectangle (-\pagewidth-\backwidth-\pagewidth,\pageheight);

    % The image. We use a right corner as anchor and shift by the amount of border separation.
    \path (\sepwidth, -\sepwidth) node[anchor=south east, inner sep=0mm, outer sep=0mm] {\includegraphics[height=\fullpageheight]{complete-cover-border-3mm-back-8mm}};

    % A red frame around back page
    \draw[red] (-\pagewidth-\backwidth,0mm) rectangle (-\pagewidth-\backwidth-\pagewidth,\pageheight);
    % A diagonal line over the complete page
    \draw[red,thick,dashed] (-\pagewidth-\backwidth,0mm) to (-\pagewidth-\backwidth-\pagewidth,\pageheight);
   \end{tikzpicture}

\end{document}