# Grayscale in tikz [duplicate]

I was trying to implement an example from the following answer https://tex.stackexchange.com/a/25708/96546 and encountered some strange behaviour. Here is an example:

\begin{figure}[h]
\centering
\selectcolormodel{gray}
\fill [red] (0,0) circle;
\fill [green] (1,0) circle;
\fill [blue] (2,0) circle;

\draw [->,-latex,thick] (-0.5,-1) -- (1,-1) node[midway,fill=red,scale=0.8]{$hello$};
\end{tikzpicture}
\caption[.]{.}
\label{Fig::Parratt3}
\end{figure}


While the colors in the \fill commands are all translated to grayscale as required the label of the \draw command remains colored. How can I get this in grayscale too?

Background: I'd like to check if the grayscale version of my picture is still legible, i.e. if the colors can be distinguished.

## marked as duplicate by TeXnician, user36296, Stefan Pinnow, Schweinebacke, diabonasSep 11 '17 at 12:16

• @ Wolpertinger Another hack I use when I cannot avoid the usage of fill=... is to mix the colour with 0% of another colour, e.g. fill=red!0!white. – user36296 Sep 11 '17 at 12:05