像官方文档中那样产生浅蓝色背景颜色的 Beamer 颜色主题名称是什么

Question

是否有一个 beamer 主题或一个 beamer 颜色主题可以产生像下面这张取自官方文档的图片那样的背景颜色？谢谢！

\documentclass[]{beamer}

\title{There Is No Largest Prime Number}

\subtitle{With an introduction to a new proof technique}

\author{Euclid of Alexandria}

\institute{Department of Mathematics\\University of Alexandria}

\date[ISPN ’80]{27th International Symposium of Prime Numbers, -280}


\begin{document}

\begin{frame}
\titlepage

\begin{block}{Results}
Proof of the Main Theorem
\end {block}

\end{frame}

\end{document}