Redefine \neo@colors@light when using white background

Previously the titlepage still got the nWhite background color.

beamertheme-source/beamercolorthemeneo.dtx

@@ -47,13 +47,13 @@
 %
 % \begin{macro}{colors}
 %    Provides the option to have a dark background and light foreground instead
-%    of the reverse.
+%    of the reverse. White is similar to light but uses a pure white background.
 %    \begin{macrocode}
 \pgfkeys{
   /neo/color/background/.cd,
     .is choice,
     dark/.code=\neo@colors@dark,
-    light/.code=\neo@colors@light,
+    light/.code=\neo@colors@bright,
     white/.code=\neo@colors@white,
 }
 %    \end{macrocode}
@@ -141,7 +141,7 @@
   }
   \usebeamercolor[fg]{normal text}
 }
-\newcommand{\neo@colors@light}{
+\newcommand{\neo@colors@bright}{
   \setbeamercolor{normal text}{%
     fg=nBlack,
     bg=nWhite
@@ -150,7 +150,9 @@
     fg=nDarkBlue,
     bg=nWhite
   }
+  \renewcommand{\neo@colors@light}{\neo@colors@bright}
 }
+\newcommand{\neo@colors@light}{\neo@colors@bright}
 \newcommand{\neo@colors@white}{
   \setbeamercolor{normal text}{%
     fg=nBlack,
@@ -160,6 +162,7 @@
     fg=nDarkBlue,
     bg=white
   }
+  \renewcommand{\neo@colors@light}{\neo@colors@white}
 }
 \setbeamercolor{alerted text}{%
   fg=nDarkRed

doc/neotheme.tex

@@ -332,9 +332,9 @@ The list of options is structured as shown in the following example.
   and |example|.
 }
 
-\DescribeOption{background}{dark, light}{light}{
+\DescribeOption{background}{dark, light, white}{light}{
   Provides the option to have a dark background and light foreground instead
-  of the reverse.
+  of the reverse. White is similar to light but uses a pure white background.
 }