\documentclass{article}
\usepackage{web}
\margins{0pt}{0pt}{0pt}{0pt}   %% Kein Seitenrand
\screensize{50mm}{80mm}      %% Dimensionen: H\"{o}he, Breite des Dokuments

\parindent0pt

\usepackage{pstricks,pstricks-add}

\definecolor{polandRed}{HTML}{DC143C} 


\begin{document}

\thispagestyle{empty}

\begin{pspicture}(0,0)(8,5)
%% Flagge (Verh\"{a}ltnis 8 Breite : 5 H\"{o}he)

\psframe[linecolor=white,fillstyle=solid,fillcolor=white](0,2.5)(8,5)
\psframe[linecolor=polandRed,fillstyle=solid,fillcolor=polandRed](0,0)(8,2.5)



\end{pspicture}
\end{document}
