beamercolor
For making a small quiz in class I am working on a presentation in beamer.
I want to change the color of statements to red (wrong statement) or green (right statement) but only after my class answered the question.
I was searching the internet, but only found the color package, where you apparently can only change the text color before it appears.
Can someone point me into the right direction?
A simple solution would be to use some predefined gray color and the ! syntax together with \colorlet; for example:
\colorlet{shadecolor}{gray!40}
(40% gray and 60% white); increasing the value used will produce darker shades and decreasing it, lighter ones.
As stated in the comments, the adding of \useoutertheme{smoothbars} tends to be the main reason of the problem, so commenting the lines gives for the code:
\documentclass[handout]{beamer}
%\usepackage{color} beamer loads xcolor anyway
\usecolortheme{rose}
\useoutertheme{infolines} % header and footer
\setbeamertemplate{headline}{} % no header line
\begin{document}
\begin{frame}
\frametitle{slide 1}
first
\end{frame}
{
\setbeamercolor{normal text}{bg=yellow!20}
\begin{frame}
\frametitle{slide 2}
second
\end{frame}
}
\end{document}
A working example with the output:
That basically solves the issue.
Best Answer
beamerprovides an overlay specification with most of its macros/environments. It allows you to say (for example)...\alert<2>{<stuff>}...so that<stuff>prints normally on slides other than number 2.\coloritself is overlay aware in the form\color<2->{blue}{<stuff>}that would print<stuff>in blue from slide 2 onward. Alternatively, one can use something like...{\only<2>{\color{blue}}<stuff>}...which prints<stuff>in blue only on slide 2.Here's a short example
Note that
beameralready loadsxcolor.