[Tex/LaTex] Setting a custom RGB background color in beamer

Question

I believe I've correctly followed the manual in defining a custom background color in the example below. But as the example shows, the background color is black rather than an extremely pale beige. Could anybody advise what I'm doing wrong please?

\documentclass{beamer}
\definecolor{MyBackground}{RGB}{1.0000    0.9451    0.6549}
\setbeamercolor{background canvas}{bg=MyBackground}
\begin{document}
\begin{frame}
Hullo world
\end{frame}
\end{document}

Answer 1

The code contains two little mistakes. First of all, commas are missing between values. And second, RGB model is defined with values between 0 and 255, while rgb model uses values between 0 and 1. Therefore, if

\definecolor{MyBackground}{RGB}{1.0000    0.9451    0.6549}

is replaced with

\definecolor{MyBackground}{rgb}{1.0000,0.9451,0.6549}

or

\definecolor{MyBackground}{RGB}{255,241,167}

everything will work.

\documentclass{beamer}
\definecolor{MyBackground}{rgb}{1.0000,0.9451,0.6549}
 %\definecolor{MyBackground}{RGB}{255,241,167}
\setbeamercolor{background canvas}{bg=MyBackground}
\begin{document}
\begin{frame}
Hullo world
\end{frame}
\end{document}