The parameter for this is a matrix of five rows of five numbers, or 25 numbers each separated by a comma.
2.0,0.0,0.0,0.0,0.0,0.0,1.0,0.0,0.0,0.0,0.0,0.0,1.0,0.0,0.0, 0.0,0.0,0.0,1.0,0.0,0.2,0.2,0.2,0.0,1.0
Here's how the colors work...You'll want to leave the last two rows of numbers pretty much as they are...AND the four and fifth set in the first three rows should also be left untouched till a basic understanding of the colors is reached.
So we are really only working with nine numbers, three for Red and three for Green, three for Blue....

This is row one...Red...


Red Channel:

Transparent of red: 0.0

Ratio of red: 0:0

This is row two...Green...


Green Channel:

Transparent of green: 0.0

Ratio of green: 0:0

This is row three...Blue...


Blue Channel:

Transparent of blue: 0.0

Ratio of blue: 0:0

Setting the Green and Blue to all zeros gives you real Red

Setting the Red and Blue to all zeros gives you real Green

Setting the Green and Red to all zeros gives you real Blue

Here are some examples of the three channels all at once. The other two numbers of each channel are all zeros. With colored images the results will be anyones guess. These were all done with a greyscale to give you a more true look of the function.

This is the original image.