Beamer Minimal Custom

\documentclass[aspectratio=169,11pt]{beamer}

% Minimal custom theme
\usepackage{xcolor}
\usepackage{tikz}

\definecolor{accent}{HTML}{D62828}
\definecolor{body}{HTML}{222222}
\definecolor{subtle}{HTML}{888888}

\setbeamercolor{title}{fg=body}
\setbeamercolor{frametitle}{fg=body}
\setbeamercolor{normal text}{fg=body}
\setbeamercolor{structure}{fg=accent}
\setbeamercolor{alerted text}{fg=accent}
\setbeamerfont{title}{size=\Huge,series=\bfseries}
\setbeamerfont{frametitle}{size=\Large,series=\bfseries}
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{itemize item}{\color{accent}$\bullet$}
\setbeamertemplate{itemize subitem}{\color{accent}$\circ$}

% Thin progress bar
\setbeamertemplate{footline}{%
\begin{tikzpicture}[remember picture, overlay]
  \draw[accent, line width=1.5pt]
    (current page.south west) -- ([xshift={\insertframenumber/\inserttotalframenumber*\paperwidth}]current page.south west);
\end{tikzpicture}%
}

\title{Minimal Custom Theme}
\subtitle{Because sometimes defaults are too much}
\author{First Last}
\date{\today}

\begin{document}

\begin{frame}[plain]
  \centering\vspace{1cm}
  {\Huge\bfseries Minimal Custom Theme}\\[6pt]
  {\large\color{subtle} Because sometimes defaults are too much}\\[20pt]
  {\small First Last $\cdot$ \today}
\end{frame}

\begin{frame}{A clean, spacious slide}
  \begin{itemize}
    \item One point
    \item Another point
    \item A third point
  \end{itemize}
\end{frame}

\begin{frame}{Two-column layout}
  \begin{columns}[T]
    \column{0.48\textwidth}
    \textbf{\color{accent}Left}
    \begin{itemize}
      \item Item A
      \item Item B
    \end{itemize}
    \column{0.48\textwidth}
    \textbf{\color{accent}Right}
    \begin{itemize}
      \item Item C
      \item Item D
    \end{itemize}
  \end{columns}
\end{frame}

\begin{frame}{An emphasis slide}
  \begin{center}
  {\fontsize{28}{32}\selectfont\bfseries\color{accent}89.4\%}
  \\[6pt]
  accuracy, up from 82.1\%.
  \end{center}
\end{frame}

\begin{frame}[plain]
  \centering\vspace{2cm}
  {\Huge\bfseries\color{accent} Thank you}\\[8pt]
  {\large\color{subtle} [email protected]}
\end{frame}

\end{document}