For red smoke, the following info will help you:
The color tag is written with four digits ranging from 0 to 255. The first is the amount of red, the second is green and the third is blue, which is why these values are almost always the same (10,10,10,255 etc). The fourth is the transparency.
So to get red smoke, use 100,0,0,255 or tweak that to your liking.
Kieran.