Possible Duplicate:
how to create PDF in grayscale mode or TikZ figure only?
How to convert tikz figure in monochrome?
Example:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw[red] circle (1);
\end{tikzpicture}
\end{document}
But i need the below result:

