Changing second color of AnnArbor beamer theme?

Question

I'm currently working on a presentation using the beamer layout of AnnArbor theme, but changed its color to Seahorse by saying

\usetheme{AnnArbor}
\usecolortheme{seahorse}

It now looks like this:

I would like to change the yellow part into another color. How do I do that?

Answer 1

As explained in this answer from TeX.SX, line 4 of the following should fit for you:

\documentclass{beamer}
\usetheme{AnnArbor}
\usecolortheme{seahorse}
\setbeamercolor{frametitle}{fg=blue,bg=orange}
\begin{document}
  \begin{frame}
    \frametitle{Agenda}
  \end{frame}
\end{document}

Please comment otherwise! :)