increase opacity of cover toc

cover.tex

@@ -32,7 +32,7 @@
 }
 
 \newcommand\placeChap[2]{%
-  \node[fill=white,fill opacity=0.6,text opacity=.7, rounded corners=5pt] at (#1) {\pageref{#2}: \nameref{#2}};
+  \node[fill=white,fill opacity=0.9,text opacity=.7, rounded corners=5pt] at (#1) {\pageref{#2}: \nameref{#2}};
 }
 
 \newcommand\backBlurb[1]{