\mode<presentation>

% {rgb,255: red,247; green,248; blue,250}}

% Settings
\setbeamercolor*{title page header}{fg={rgb,255: red,247; green,248; blue,250}}
\setbeamercolor*{author}{fg={rgb,255: red,23; green,33; blue,42}}
\setbeamercolor*{date}{fg={rgb,255: red,23; green,33; blue,42}}
\setbeamercolor*{item}{fg={rgb,255: red,188; green,7; blue,68}}

\mode
<all>
