backgroundscolorgradient
Is anyone aware if it's possible to change an entire document's background to a fading color?
In other words, can you take silver and slowly fade it to white from left to right and have this same effect throughout the entire document? I understand I could probably take Inkscape, make an image and put a background image for each page. I cannot find anything native which works so far.
Note that this is for a normal report based document and not for a beamer presentation.
The background colour for the frame title in the CambridgeUS theme uses the beaver colour scheme and is set to
\setbeamercolor{frametitle}{bg=gray!10!white}
You can remove the entire background colour by adding
\setbeamercolor{frametitle}{bg={}}
after loading the theme:
The default background canvas is defined as
\defbeamertemplate*{background canvas}{default}
{%
\ifbeamercolorempty[bg]{background canvas}{}{\color{bg}\vrule width\paperwidth height\paperheight}%
}
So it just draws a box filling the whole frame with the background canvas color. That's why changing the background canvas color does not have any effect anymore, if the default background canvas is overwritten.
But there is another background layer simply called background which is drawn on top of the background canvas. After changing \setbeamertemplate{background canvas} to \setbeamertemplate{background} the first solution works.
\PassOptionsToPackage{demo}{graphicx}
\documentclass{beamer}
\begin{document}
{
\setbeamercolor{background canvas}{bg=red}
\setbeamertemplate{background}{%
\parbox[c][\paperheight][c]{\paperwidth}{%
\centering\includegraphics[width=\paperwidth]{name}
}
}
\begin{frame}[plain]
\end{frame}
}
\end{document}
The second solution doesn't work because every beamer frame has a text margin left (and text margin right) and this shifts the image in this case to the right because with its width of \paperwidth it doesn't fit inside anymore. To solve the issue here one could shift it back using \hspace with a negative length. In this case it is \hspace*{-1cm}.
\PassOptionsToPackage{demo}{graphicx}
\documentclass{beamer}
\begin{document}
{
\setbeamercolor{background canvas}{bg=red}
\begin{frame}[plain]
\hspace*{-1cm}%
\parbox[c][\paperheight][c]{\paperwidth}{
\centering\includegraphics[width=\paperwidth]{name}
}
\end{frame}
}
\end{document}
Best Answer
I have chosen a conspicuous color. You may choose any color of your choice.