How do I set the grayscale values for arrows in xypic?
You can use xcolor
package which provides the gray
color.
\documentclass[10pt]{article}
%\usepackage{amsmath}
%\usepackage{graphicx}
\usepackage[all]{xy}
\usepackage{xcolor}
\begin{document}
\[\xymatrix{\bullet \ar@[gray][r] & \bullet}\]
\end{document}
You have to specify the color model. You find the syntax in section 13 of the Xy-pic reference guide (texdoc xyrefer
).
\documentclass{article}
\usepackage{amsmath}
\usepackage[all,cmtip]{xy}
\newxycolor{testgray}{.5 gray}
\begin{document}
\begin{equation*}
\xymatrix{\bullet \ar@[testgray][r] & \bullet}
\end{equation*}
\end{document}
I added cmtip
because my eyes bleed when I see the default arrow tips. Also align
should never be used for simple equations not involving alignment (and \xymatrix
alone doesn't count).