LaTeX Forum

\documentclass[leqno,t,xcolor=dvipsnames]{beamer}
\useoutertheme{sidebar}
\useinnertheme{circles}



\definecolor{mygreen}{RGB}{38,70,0}
\definecolor{myngreen}{RGB}{0,160,0}

\definecolor{bgc}{RGB}{170,255,114}

\setbeamercolor{section in toc}{fg=mygreen}
\setbeamertemplate{section in toc shaded}[default][50]
\setbeamercolor{section in sidebar}{fg=LimeGreen}
\setbeamercolor{section number projected}{bg=mygreen,fg=LimeGreen}
\setbeamercolor{title in sidebar}{fg=LimeGreen}
\setbeamercolor{normal text}{fg=Black}
\setbeamercolor{frametitle}{fg=LimeGreen}
\setbeamercolor{author in sidebar}{fg=LimeGreen}
\setbeamercolor{block body}{bg=LimeGreen}
\setbeamercolor{item}{fg=mygreen,bg=mygreen}
\setbeamercolor{block title}{bg=mygreen,fg=LimeGreen}
\setbeamercolor{title}{fg=ForestGreen}
\setbeamercolor{background canvas}{bg=bgc}
\setbeamercolor{sidebar}{bg=mygreen}
\setbeamertemplate{itemize item}{\color{black}$\blacksquare$}
\setbeamercolor{title}{fg=mygreen}



%neue Rechtschreibung und weitere Pakete
\usepackage{ngerman}
\usepackage{enumitem}
\usepackage{color}
\usepackage{wrapfig}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel} 

\usepackage{floatflt}
\usepackage{multirow}
\usepackage{mathtools}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{extpfeil}
\usepackage{mathabx}

\theoremstyle{definition}
\usepackage{bm}

\newcommand{\gr}{\ensuremath{^{\circ}}}

\begin{document}


\begin{frame}
 \frametitle{itemize geht net}
 \setbeamertemplate{itemize item}{\color{black}$\blacksquare$} %Fehler auch ohne diese Zeile
 \begin{itemize}
  \item<1-> fifo
  \item<2-> filo
  \item<3-> lifo
 \end{itemize}
\end{frame}

\end{document}