% Deontic hexagram by Berislav \v{Z}arni\'{c}
\documentclass{article}
\usepackage{tikz} 
\begin{document}
\begin{tikzpicture}[auto,thick,main node/.style={fill=blue!20,rounded corners, 
font=\rmfamily\footnotesize}]
\node[main node] (1) at (1,2) {Permitted $\varphi$}; 
\node[main node] (2) at (3,0.75) {Optional $\varphi$};
\node[main node] (3) at (5,2) {Gratuitous $\varphi$}; 
\node[main node] (4) at (5,4) {Forbidden $\varphi$}; 
\node[main node] (5) at (3,5.25) {Non-optional $\varphi$}; 
\node[main node] (6) at (1,4) {Obligatory $\varphi$};
\path
(6) edge [-,blue] node {} (2) 
edge [-,blue] node {} (4) 
edge [->,black] node {} (1) 
edge [->,brown] node {} (5) 
edge [-,red] node {} (3) 
(1) edge [-,green] node {} (5) 
edge [-,red] node {} (4) 
edge [-,green] node {} (3) 
(2) edge [->,brown] node {} (1) 
edge [-,blue] node {} (4) 
edge [->, brown] node {} (3) 
edge [-,red] node {} (5) 
(3) edge [-,green] node {} (5) 
(4) edge [->,black] node {} (3)
(4) edge [->,brown] node {} (5) 
;
\end{tikzpicture}
\end{document}