\documentclass{article}
\usepackage{web}
\margins{0pt}{0pt}{0pt}{0pt}   %% Kein Seitenrand
\screensize{150mm}{300mm}      %% Dimensionen: H\"{o}he, Breite des Dokuments

\parindent0pt

\usepackage{pstricks,pstricks-add}

\definecolor{hungaryRed}{HTML}{CE1126} 
\definecolor{hungaryGreen}{HTML}{008751}

\begin{document}

\thispagestyle{empty}

\begin{pspicture}(0,0)(30,15)
%% Flagge (Verh\"{a}ltnis 2 Breite : 1 H\"{o}he)

\psframe[linecolor=hungaryRed,fillstyle=solid,fillcolor=hungaryRed](0,10)(30,15)
\psframe[linecolor=white,fillstyle=solid,fillcolor=white](0,5)(30,10)
\psframe[linecolor=hungaryGreen,fillstyle=solid,fillcolor=hungaryGreen](0,0)(30,5)
\end{pspicture}
\end{document}
