+\tikzstyle{edge minimum} = [edge,color=blue!20]
+\tikzstyle{edge maximum} = [edge,color=red!20]
+\tikzstyle{vertex active minimum} = [vertex,color=blue!50, fill=blue!50]
+\tikzstyle{vertex active maximum} = [vertex,color=red!50, fill=red!50]
+\tikzstyle{vertex inactive minimum} = [vertex,color=blue!20, fill=blue!20]
+\tikzstyle{vertex inactive maximum} = [vertex,color=red!20, fill=red!20]
+\tikzstyle{vertex inactive minimum maximum} = [vertex,color=black!20, fill=black!20]
+\tikzstyle{comp active minimum} = [comp]
+\tikzstyle{comp active maximum} = [comp]
+\tikzstyle{comp inactive minimum} = [comp,color=blue!20]
+\tikzstyle{comp inactive maximum} = [comp,color=red!20]
+\tikzstyle{comp inactive minimum maximum} = [comp,color=black!20]
+