[Tex/LaTex] Adding background color to title slide in beamer

Question

How can I add a solid background color only to the title slide in beamer?

This is what I am doing after \begin{document}

\setbeamercolor{background canvas}{bg=blue}
\begin{frame}
Hello
\end{frame}
\setbeamercolor{background canvas}{bg=}

Answer 1

You can temporarily change colors between frames.

\documentclass{beamer}
\author{Beamer Author}
\date{\today}

\begin{document}
\setbeamercolor{background canvas}{bg=red}
\begin{frame}
\titlepage  
\end{frame}
\setbeamercolor{background canvas}{bg=}
\frame{The remaining frames $M=at^h$}
\end{document}