\documentclass[a4paper]{article}

\usepackage{pgfplots}

\pgfplotsset{compat=1.4}

\begin{document}

\begin{tikzpicture}
\begin{axis}[
	xlabel=$x$,
	ylabel=$y$]
\addplot3[surf,samples=10,shader=interp,
  mesh/interior colormap={blueblack}{color=(black) color=(blue)},
  colormap/blackwhite, 
	domain=-3:3] 
	{x^3*y^3};
\end{axis}
\end{tikzpicture}
\end{document}

