\documentclass{article}
\usepackage{web}
\margins{0pt}{0pt}{0pt}{0pt}   %% Kein Seitenrand
\screensize{100mm}{150mm}      %% Dimensionen: H\"{o}he, Breite des Dokuments

\parindent0pt

\usepackage{pstricks,pstricks-add}

\definecolor{austriaRed}{HTML}{F5002F} %Pantone 186 


\begin{document}

\thispagestyle{empty}

\begin{pspicture}(0,0)(15,10)
%% Flagge (Verh\"{a}ltnis 3 Breite : 2 H\"{o}he)
\psframe[linecolor=austriaRed,fillstyle=solid,fillcolor=austriaRed](!0 10 3 div 2 mul)(15,10)
\psframe[linecolor=white,fillstyle=solid,fillcolor=white](!0 10 3 div)(!15 10 3 div 2 mul)
\psframe[linecolor=austriaRed,fillstyle=solid,fillcolor=austriaRed](0,0)(!15 10 3 div)



\end{pspicture}
\end{document}
