\DefineNamedColor{named}{darkgreen}   {rgb}{0,0.16,0.14}
\DefineNamedColor{named}{XSYUdarktblue} {rgb}{0.11,0.27,0.62}
\DefineNamedColor{named}{XSYUoceanblue} {rgb}{0.22,0.42,0.74}
\DefineNamedColor{named}{XSYUskytblue} {rgb}{0.22,0.54,0.74}
\mode<presentation>
\setbeamercolor{alerted text}{fg=red!80!yellow}
\setbeamercolor*{palette primary}{bg=XSYUoceanblue,fg=white}
\setbeamercolor*{palette secondary}{fg=white,bg=XSYUskytblue}
\setbeamercolor*{palette tertiary}{fg=white,bg=XSYUdarktblue}
\setbeamercolor*{palette quaternary}{fg=white,bg=yellow}
\setbeamercolor*{structure}{fg=XSYUoceanblue,bg=white}
\setbeamercolor{frametitle}{bg=XSYUoceanblue,fg=white}
\setbeamercolor{block title alerted}{use=alerted text,fg=alerted text.fg,bg=alerted text.fg!30!bg}
\setbeamercolor{block title example}{use=example text,fg=example text.fg,bg=example text.fg!30!bg}
\mode<all>