\Header{gray}{Gray Level Specification}
\keyword{color}{gray}
\begin{Usage}
\begin{verbatim}
gray(level)
\end{verbatim}
\end{Usage}
\begin{Value}
This function creates ``colors'' corresponding to the given level of gray.
The level must lie between zero and one, with zero indicating \texttt{"black"}
and one indicating \texttt{"white"}.

The values returned by \texttt{gray} can be used with a
\texttt{col=} specification in graphics functions or in \texttt{\Link{par}}.\end{Value}
\begin{SeeAlso}
\texttt{\Link{rainbow}}, \texttt{\Link{hsv}}, \texttt{\Link{rgb}}.\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
gray(0:8 / 8)
\end{ExampleCode}
\end{Examples}

