Here's how colorshift works
0 0 0 0 = black invisible
r g b a
If you understand how RGBA works, you need to set the 0s to a decimal number between 0-1.
In RGBA, it's between 0-1, 0-255, or 0-FF. In this case, 0-1.
So if you wanted it to be red: 1 0 0 1
If you wanted it to be red and slightly transparent: 1 0 0 0.9
etc.