"improved" colors given in the codeexample of pull request pgf-tikz…

…#871

doc/generic/pgf/text-en/pgfmanual-en-tikz-matrices.tex

@@ -485,7 +485,7 @@ \subsubsection{Cell Styles and Options}
 \begin{codeexample}[preamble={\usetikzlibrary{matrix,shapes.misc}}]
 \begin{tikzpicture}
   [mycol/.style={column #1/.append style={
-     every even row/.style={nodes={fill=gray!10}}}
+     every even row/.style={nodes={fill=gray!20}}}
    }]
 
 \matrix [matrix of nodes, nodes in empty cells,
@@ -494,11 +494,11 @@ \subsubsection{Cell Styles and Options}
    mycol/.list={1,...,5}, % add mycol style to all cols
    column 1/.style={
      row 1 column 1/.style={nodes={fill=none, draw=none}},
-     nodes={fill=yellow, chamfered rectangle, inner sep=0,
+     nodes={fill=yellow!75!black, chamfered rectangle, inner sep=0,
             chamfered rectangle corners={north west, south east}},
    },
    row 1/.style={nodes={text depth=0.2ex, text width=2cm, text=white}},
-   column 2/.append style={row 1/.append style={nodes={fill=green}}},
+   column 2/.append style={row 1/.append style={nodes={fill=green!75!black}}},
    column 3/.append style={every even row/.style={nodes={fill=red!10}},
                            row 1 column 3/.append style={nodes={fill=red}}
                           },
@@ -521,7 +521,6 @@ \subsubsection{Cell Styles and Options}
 \end{tikzpicture}
 \end{codeexample}
 
-
 The order in which these styles are applied is configurable.  You can also
 install your own styles.  The following styles (in fact, internally they are
 |/.code| keys) wrap the styles introduced in the previous paragraph passing the