Arrow's color in WinGraphviz(16/03 2003)

color of arrow	DOT language
Color Name	digraph G { rankdir="LR"; 1 -> 2 [label="Arrow color" color="dodgerblue" ] }
HSV	digraph G { rankdir="LR"; 1 -> 2 [label="Arrow color" color="0.002 0.999 0.999" ] }
RGB	digraph G { rankdir="LR"; 1 -> 2 [label="Arrow color" color="#1E92FF" ] }

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