Use only one RGB cable for standard def video?

[Retricide]

Hi,
I'm trying to connect my monitor to a dazzle with a VGA to RGB converter, but i'm wondering if I can just connect one cable ( like just the green one) to the yellow video Jack on the dazzle.
Alternatively, is there any way to connect VGA to RYW or svideo?
Thanks in advance

[UncasMS]

with RGB cables only one certain colour range is being transported per single cinch connection

using only red or green or blue will therefor not provide you with a decent picture