\renewcommand\sfdefault{phv}
\renewcommand\familydefault{\sfdefault}
\usetheme{default}
\usepackage{color}
\useoutertheme{default}
%\usepackage{texnansi}
%\usepackage{marvosym}
\definecolor{bottomcolour}{rgb}{1,1,1}
\definecolor{middlecolour}{rgb}{1,1,1}
\definecolor{lightgray}{rgb}{0.8,0.8,0.8}
\setbeamerfont{title}{size=\Huge}
\setbeamercolor{structure}{fg=black}
\setbeamertemplate{frametitle}[default]%[center]
\setbeamercolor{normal text}{bg=white, fg=black}
\setbeamercolor{background canvas}{bg=white, fg=white}
\setbeamertemplate{items}[circle]
\setbeamerfont{frametitle}{size=\huge}
\setbeamertemplate{navigation symbols}{} %no nav symbols
\setbeamercolor{block title}{parent=normal text, bg=gray}
\setbeamercolor{block body}{parent=normal text, use=block title,bg=lightgray}
\setbeamercolor{section in toc}{use=structure,parent=structure,fg=structure.fg!50}
%\setbeamercolor{titlelike}{parent=structure,fg=white}
