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Figured it out. The colors need to be set before the block is entered. Duh!

\newcommand{\myColorBlock}[4][30]{
\setbeamercolor{block title}{bg= #3}
\setbeamercolor{block body}{bg= #3!#1}
\begin{block}{#2}
#4
\end{block}
}

Now it works fine!

Hi Everyone/Anyone

Using Beamer, I occasionally want to customize the colors for a block title background and body background to match one of the colors in an illustration on that slide.

It goes like this:

\begin{frame}
\setbeamercolor{block title}{bg=earthGreen}
\setbeamercolor{block body}{ bg ...

Perfect. Many thanks.

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Does anyone here have experience with pdfscreen?

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