更改 Beamer 幻灯片的背景颜色

Question

我正在使用以下投影仪代码。我想将背景更改为浅奶油色（我们可以使用黄色作为示例）。我在网上和这里寻找解决方案，但找不到。（这并不是说没有解决方案。）我拼凑了以下 MWE。我希望这两张幻灯片都有黄色背景。并且所有后续幻灯片都有黄色背景。提前感谢您的帮助。我在这里包含了我使用的两张图片：

\documentclass[bigger]{beamer}    
\usepackage[utf8]{inputenc}    
\usepackage[T1]{fontenc}    
\usepackage{hyperref}    
\usepackage{amsfonts}    
\usepackage{xcolor}    
\usepackage{graphicx}    
\usepackage[normalem]{ulem}    
\usepackage{mathrsfs}    
\usepackage{lmodern}    

\definecolor{devryblue}{RGB}{5, 51, 92}    
\setbeamercolor{frametitle}{fg=devryblue}    
\setbeamertemplate{frametitle}{\color{devryblue}\bfseries\insertframetitle\par}    
\setbeamercolor{background canvas}{bg=yellow}    
%Global Background must be put in preamble    
\usebackgroundtemplate%    
{%    
    \includegraphics[width=\paperwidth,height=\paperheight]
{/Users/gregoryegilbert/Desktop/basic_statistics/jpg/UW_DVG_Background.jpg}%        
}

\begin{document}    
% Local background must be enclosed by curly braces for grouping.    
{    
\usebackgroundtemplate{\includegraphics[width=\paperwidth]
{/Users/gregoryegilbert/Desktop/basic_statistics/jpg/UW_DVG_Title_Page.jpg}}    
\begin{frame}    
   \centering    
   Statistics for the Novice and Applied Researcher: Correct, Meaningful, and Clear 
Statistical Interpretation   \par    
   \vspace*{.5cm}    
   Gregory E. Gilbert, EdD, MSPH, PStat$^{\textregistered}$ \\    
   Biostatistical Research Associate \\    
   DeVry Education Group \\    
   Downers Grove, IL   \par    
   \vspace*{.5cm}    
   Katie Haerling, PhD, RN \\    
   University of Washington -- Tacoma \\    
   Tacoma, WA \\    
\end{frame}    
}    

\begin{frame}{Conflict of Interest}    
      \vspace*{-1cm}    
      Gregory E. Gilbert owns stock in DeVry Education Group (NYSE: DV).    
      \vfill    
      Katie Adamson has no conflict of interest to declare.    
    \vspace*{1cm}    
\end{frame}    
\end{document}