%% 
%%  An UIT Edition example
%% 
%%  Example 01-03-5 on page 13.
%% 
%%  Copyright (C) 2012 Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

% Show page(s) 1,2

%% ==== 
\PassOptionsToClass{}{beamer}
\documentclass{exabeamer}
\usepackage[utf8]{inputenc}
\setbeamercolor*{background canvas}{bg=black!30}
\setbeamercolor*{normal text}{fg=white}

%\StartShownPreambleCommands
\documentclass{beamer}
\newcommand\TeXt{The first step in designing your own colour scheme is to
choose a base colour. The base colour could be one of your favourite colours,
a colour suggested by your environment, a colour to help convey the
appropriate mood, or a colour following trends.\par}
%\StopShownPreambleCommands

\begin{document}
\begin{frame}{Bright text colour}{}
\begin{columns}[t]
\begin{column}{0.45\linewidth}
\TeXt \bigskip
\vfill\tiny \TeXt
\end{column}
\begin{column}{0.45\linewidth}\color{black}
\TeXt \bigskip
\vfill\tiny \TeXt
\end{column}
\end{columns}
\end{frame}

\setbeamercolor{background canvas}{bg=black!10}
\begin{frame}{Darker text colour}{Lighter background}
\color{blue!60!white}
\begin{columns}[t]
\begin{column}{0.45\linewidth}
\TeXt \bigskip
\vfill\tiny \TeXt
\end{column}
\begin{column}{0.45\linewidth}\color{black}
\TeXt \bigskip
\vfill\tiny \TeXt
\end{column}
\end{columns}
\end{frame}
\end{document}