\documentclass{article}
\usepackage{pstricks}
\pagestyle{empty}
\parindent=0pt

\begin{document}

\psset{griddots=0,subgriddiv=5}
\xdefinecolor{orange}{cmyk}{0,0.61,0.87,0}
\begin{pspicture}(10,5)
  \psgrid[subgriddiv=10,gridlabels=0,%
     gridwidth=1pt,gridcolor=orange,%
     subgridwidth=0.1pt,subgridcolor=orange]
\end{pspicture} 

\end{document}
