I'd like to be able to achieve the following colouring of the arrow of an "accepting by arrow" node, but on a node-by-node basis, rather than globally:
From this question I was able to see how to set the arrow style globally, but my Tikz knowledge is quite basic, and I wasn't able to figure out how to set the colour of the accepting arrow for a particular node. (Setting the node colour to red doesn't change the colour of the accepting arrow.)
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{automata}
\tikzset{positive/.style={circle,red,minimum width=8pt,draw}}
\begin{document}
\begin{tikzpicture}[every accepting by arrow/.style={red}]
\node[positive,initial,initial text=,accepting by arrow] (A) {};
\end{tikzpicture}
\end{document}