[Tex/LaTex] How to change the background color of a footer in beamer

backgroundsbeamercolorheader-footer

I know just enough about beamer to be a danger to myself. I am trying to change the color of a footer in Boadilla and am struggling.

First, I have declared 

\usecolortheme[named=black]{structure}

so that I get black text for frame titles. (Probably neither necessary nor terribly elegant.)

I would like the background of the footer to be a light blue with a yellow \hrule across the top. I am using the following code:

\makeatother
\setbeamertemplate{footline}
{
\leavevmode%
\hbox{%
\begin{beamercolorbox}[color=blue, wd=\paperwidth,ht=1in,dp=1ex,center]{title in head/foot}%
\usebeamerfont{title in head/foot}\hfill\insertshorttitle\hfill\insertframenumber{}
\end{beamercolorbox}}%
\vskip0pt%
}
\makeatletter
\setbeamertemplate{navigation symbols}{}

I can't seem to make the background color change. Any help available?

Best Answer

The leads to the previous questions were very helpful. Here is the code that ended up working, in the hopes that it helps someone else further down the road:

\definecolor{ilpablue}{rgb}{0.16,0.43,0.75}
\definecolor{ilpayellow}{rgb}{0.86,0.69,0.13}
\setbeamercolor{footlinecolor}{fg=white,bg=ilpablue}
\renewcommand\footnoterule{{\color{ilpayellow}\hrule height 0.5pt width \paperwidth}}

\makeatother
\setbeamertemplate{footline}{%
  \leavevmode%
\textcolor{ilpayellow}{\hrule}
  \footnoterule
  \hbox{%
  \begin{beamercolorbox}[wd=\paperwidth,ht=0.25in,dp=1ex,center]{footlinecolor}
    \hfill{\normalsize ILPA  WEBCAST  SERIES} \hfill
    \insertframenumber{}
    \vskip0pt plus.5fill
  \end{beamercolorbox}}%
  \vskip0pt%
}
\makeatletter
\setbeamertemplate{navigation symbols}{}

That code block pretty much exactly replicates the logo I was given.

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