Redefine nWhite with pure white on background option 'white'

beamertheme-source/beamercolorthemeneo.dtx

@@ -152,14 +152,8 @@
   }
 }
 \newcommand{\neo@colors@white}{
-  \setbeamercolor{normal text}{%
-    fg=nBlack,
-    bg=white
-  }
-  \setbeamercolor{normal item}{%
-    fg=nDarkBlue,
-    bg=white
-  }
+  \definecolor{nWhite}{RGB}{255,255,255}
+  \neo@colors@light
 }
 \setbeamercolor{alerted text}{%
   fg=nDarkRed