答案1
我建议使用侧边栏外部主题并调整宽度和高度以适合您的模板(这也具有内置机制,可在左上角放置徽标)
\documentclass{beamer}
\definecolor{tuniviolet}{RGB}{78,0,142}
\setbeamercolor{background canvas}{bg=tuniviolet}
\useoutertheme[width=0.3cm,height=0.7cm]{sidebar}
\setbeamercolor{frametitle}{bg=white}
\setbeamercolor{sidebar left}{bg=white}
\logo{\makebox[\beamersidebarwidth][l]{\includegraphics[width=3cm,height=0.7cm]{example-image-duck}}}
\begin{document}
\begin{frame}
abc
\end{frame}
\end{document}