% babybeamer9 presentation

\documentclass{beamer}

\begin{document}
\setbeamercolor{normal text}{bg=yellow!15}

\begin{frame}
\frametitle{Colors}

\begin{columns}[t]
  \begin{column}{2in}
{\color{red}Is it true that there is no new result
on the Congruence Lattice Characterization Problem?}
  \end{column}
    \begin{column}{2in}
{\color{green}F. Wehrung found a distributive 
algebraic lattice that cannot be represented 
as the congruence lattice of a lattice.}
  \end{column}
\end{columns}
\end{frame}

\setbeamercolor{normal text}{bg=green!15}

\begin{frame}
\frametitle{Colors fading out}

We introduce our guests:
\begin{itemize}
\item {\color{red}R. Padmanabhan}
\item {\color{red!60!white}Brian Davey}
\item {\color{red!40!white}Harry Lakser}
\item {\color{red!20!white}Dick Koch}
\end{itemize}
\end{frame}
\end{document}