Re: Color Reference of NTSC Formula?

[Mark McDougall <markm@vl.com.au>]

Bryan Parkoff wrote:

>     Think about Deep Red, Dark Blue, and Purple.  You display Deep Red. 
> Then, you want to display Purple instead of Deep Red.  You have to add Dark 
> Blue to the screen.  It is like Deep Red and Dark Blue are joined together 
> like "OR" to become Purple.  Deep Red "OR" Dark Blue = Purple.

I think your logic is not quite valid for a system based on luminance
and chrominance. You can think this way for RGB because it is 'additive'
- adding and subtracting components of R,G & B give you colours ranging
from black to white.