\documentclass[aspectratio=169]{beamer}
\usepackage{color}
\usepackage{pgfpages}

\setbeameroption{show notes on second screen}

\title{Colored Pages without content}

\begin{document}



\definecolor{8f8}{HTML}{88FF88}
\definecolor{f8f}{HTML}{FF88FF}

\begingroup
	\setbeamercolor{background canvas}{bg=8f8}
	\setbeamercolor{note page}{bg=f8f}
	\begin{frame}
	\end{frame}
\endgroup

\end{document}
