beamerthemeimise.sty

\usetheme{CambridgeUS}
\usecolortheme{dolphin}
\setbeamertemplate{headline}{}
\usepackage[export]{adjustbox}
\usepackage{xcolor}

\usepackage[quiet]{fontspec}

\mode<presentation>
\usepackage{amssymb}
\usepackage{tikz}

\setsansfont{Futura Book}

\setbeamertemplate{navigation symbols}{}

\definecolor{imiseblue}{HTML}{005FB9}
\setbeamercolor{footer}{fg=white, bg=imiseblue}
\setbeamercolor{title}{fg=darkred, bg=white}

\setbeamertemplate{itemize item}{\color{imiseblue}$\blacktriangleright$}
\setbeamertemplate{itemize subitem}{\color{imiseblue}$\blacktriangleright$}
\setbeamertemplate{section in toc}{\color{imiseblue}\inserttocsection}
\setbeamercolor{local structure}{fg=imiseblue}


\let\origframetitle=\frametitle
\renewcommand\frametitle[1]{\origframetitle
{
\setbeamertemplate{frametitle}[default][left] 
\begin{tikzpicture}[remember picture,overlay] 
    \node [anchor=north east,xshift=0.4em,yshift=0.4em] at (current page.north east) % for unknown reasons, the x and y shift is necessary and different for each aspect ratio 
      {\includegraphics[width=0.35\textwidth,right]{img/unileipzig.pdf}};
  \end{tikzpicture}
#1
}
}

\defbeamertemplate*{title page}{customized}[1][]
{
\setbeamertemplate{footline}{}

\begin{tikzpicture}[remember picture,overlay]  
    \node [anchor=north east,xshift=0.4em,yshift=0.4em] at (current page.north east) % for unknown reasons, the x and y shift is necessary for perfect alignment
      {\includegraphics[width=0.35\textwidth,right]{img/unileipzig.pdf}};
  \end{tikzpicture}

  {\usebeamerfont{title}\usebeamercolor[fg]{title}\inserttitle\par}
 \vspace{0.05\textheight}
  \usebeamerfont{subtitle}\insertsubtitle\par
\vspace{0.15\textheight}% align blue box at bottom
  \begin{beamercolorbox}[wd=\paperwidth,ht=0.6\textheight,dp=1ex,colsep=10pt,left]{footer}%
\usebeamerfont{author}\insertauthor\par
  \usebeamerfont{date}\insertdate\par
~\\~\\~\\~\\
{\normalsize imise \hspace{-0.3em}\tiny\color{orange}~\scalebox{.4}{$\blacksquare$}}\\
 Institut für Medizinische Informatik, Statistik und Epidemiologie\\~\\
  \end{beamercolorbox}%
}

\makeatother
\setbeamertemplate{footline}
{
 \vspace{1.5em} % put footnotes higher, unfortunately also 
 \ifnum\insertframenumber>1%
\vspace{-5em} %ifnum somehow moves it too far below, workaround
  \leavevmode%
  \hbox{%
  \begin{beamercolorbox}[wd=.1\paperwidth,ht=2.9ex,dp=1ex,colsep=0pt,left]{footer}%colsep and extra width to hopefully prevent white vertical lines in between color boxes
{\normalsize imise \hspace{-0.3em}\huge\color{orange}.}
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.8\paperwidth,ht=2.9ex,dp=1ex,colsep=0pt,center]{footer}%
    \usebeamerfont{title in head/foot}\insertshorttitle---\insertshortauthor---\insertshortdate
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.1\paperwidth,ht=2.9ex,dp=1ex,colsep=0pt,right]{footer}%
    \usebeamerfont{title in head/foot}\insertframenumber{} %/ \inserttotalframenumber
    \hspace*{1ex}
  \end{beamercolorbox}
}%
\fi%
}
\makeatletter

\mode<all>