% TeachBlueRedTheme, by Mathieu Degrange

\redefinecolor{thm}{title}{bgcolor}{red}
\redefinecolor{prop}{title}{bgcolor}{red}
\redefinecolor{lemme}{title}{txtcolor}{red}
\redefinecolor{cor}{title}{txtcolor}{red}
\redefinecolor{defn}{title}{bgcolor}{red!70!black}
\redefinecolor{exo}{title}{txtcolor}{blue!60!black}
\redefinecolor{exo}{rule}{color}{blue!60!black}
\redefinecolor{act}{title}{txtcolor}{blue!60!black}
\redefinecolor{act}{rule}{color}{blue!60!black}