### Description
This example shows how to produce a HTML page called [VTKNamedColorPatches](http://htmlpreview.github.com/?https://github.com/lorensen/VTKExamples/blob/master/src/Python/Visualization/VTKNamedColorPatches.html) showing the available
colors in vtkNamedColors.

It also shows how to select the text color based on luminance.
In this case Digital CCIR601 is used which gives less weight to the
red and blue components of a color.

In the class HTMLTableMaker there are four methods that generate the HTML tables:

 * MakeWebColorPage() -- Makes a page of just the colors and names known to Web Browsers.
 * MakeVTKColorPage() -- Makes a page of colors and names corresponding to those in vtkColors.txt.
 * MakeSynonymColorPage() -- Makes a page of color names and their synonyms.
 * MakeCombinedColorPage() -- Makes an indexed page with all the colors and names in the class vtkNamedColors.
