[Coco] Documentation of "complex" artifacting (i.e. more than black/white/blue/red)?

[Robert Gault]

John W. Linville wrote:
> On Fri, May 21, 2010 at 05:05:41PM -0400, John W. Linville wrote:
>> Are there any articles in Rainbow or similar CoCo-oriented publications
>> that documented use of "complex" artifacting for producing additional
>> colors (e.g. purple, green, etc) with a CoCo?  Can anyone refer me
>> to one?
>
> I suppose it is bad form to reply to oneself, but at least if I
> reply in this thread then I am more likely to be able to find this
> information when I need it again. :-)
>

You need to understand how the NTSC system works to understand color artifacts. 
A good place to start is here:
http://en.wikipedia.org/wiki/Color_Graphics_Adapter
Any Internet search for "NTSC artifact colors" will give you many hits.