diff --git a/morphologyqp.sty b/morphologyqp.sty
index 1342256..de9b179 100644
--- a/morphologyqp.sty
+++ b/morphologyqp.sty
@@ -145,6 +145,9 @@
     \textsf{#3} & \textsf{#4} \\
   \end{tabular}}
 
+\newcommand{\clrbox}[1]{%
+  \begin{tikzpicture}\node [draw,circle,fill=#1] {\hspace{1em}};\end{tikzpicture}}
+
 \definecolor{darkgreen}{rgb}{0,0.4,0}
 \definecolor{darkred}{rgb}{0.4,0,0}
 \definecolor{darkblue}{rgb}{0,0,0.4}