\mode<presentation>

% Settings
\setbeamercolor*{title page header}{fg=blue}
\setbeamercolor*{subtitle page header}{fg=black}

\setbeamercolor*{title frametitle}{fg=black}
\setbeamercolor*{subtitle frametitle}{fg=black}

\setbeamercolor*{author}{fg=red}
\setbeamercolor*{date}{fg=black}
\setbeamercolor*{item}{fg=black}
\setbeamercolor*{upper separation line foot}{bg=blue}
\setbeamercolor*{lower separation line head}{bg=blue}

\mode
<all>