beamercolor
When i compile the following code, i get the package keyval error, undefined code. Please help!
\documentclass{beamer}
\usepackage[frenchb]{babel}
\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc}
\usepackage{newcent}
\usepackage{color}
\usetheme{Warsaw}
\setbeamercolor{normal text}{teal}
\begin{document}
\begin{frame}
\setbeamertemplate{background canvas}[vertical shading][top=white,bottom=blue]
Texte n'ayant pas encore subi de changement de couleur.
\end{frame}
\end{document}
Please always post complete documents, not just fragments. (Here I use draft so the figure is not included)
As noted in comments the error message is telling you that the [2] argument is incorrect,
you do not specify the number of columns in beamer.
\documentclass[draft]{beamer}
\begin{document}
\begin{frame}
\begin{itemize}
\item Assuming equal power allocation at the source \vspace{0.2cm}
\item Water-filling scheme at the relays over spatial \& temporal domains \vspace{0.1cm}
\item IAPC at each relay puts a lid on the water vessel
\end{itemize}
\begin{columns}
\begin{column}{0.4\textwidth}
\begin{itemize}
\item Relays are rarely used at very low \& high SNRs \vspace{0.2cm}
\item Stronger relay is used more often \vspace{0.2cm}
\end{itemize}
\end{column}
\begin{column}{0.6\textwidth}
\includegraphics[scale=0.4]{Figures/Pon/Pon_naf1_c.eps}
\end{column}
\end{columns}
\end{frame}
\end{document}
You are looking for the colour LightBlue2, not lightblue2.
Internally all colours are represented as macros and, macros are case-sensitive. That is, \latex is different from \Latex and \LaTeX and \LATEX and... In fact colour X is stored in a macro \\color@X:
\documentclass{article}
\usepackage[x11names]{xcolor}
\begin{document}
\textcolor{LightBlue2}{something}
\makeatletter
\ttfamily\verb|\\color@LightBlue2|:
\expandafter\expandafter\expandafter\strip@prefix\expandafter\meaning\csname \string\color@LightBlue2\endcsname
\end{document}
Best Answer
you have to use beamer colors, that is a foreground and background color: