[Derek Gilmore]

So I was able to get it to work, and I’m not sure why it works, but…

Adding a black solid into the spectrum comp and setting that layer to SCREEN causes the colouring effect to work.

I discovered this when I added another layer for an additional effect, but that layer was scaled so it only covered part of the spectrum.

You can see the white section at the top of the spectrum.

Like I said I don’t understand this behaviour, but I’m happy to have stumbled upon it, and to share in case someone else can use the info. ^___^

[Derek Gilmore]

Ah, okay. Thanks for taking the time to explain it.

[Derek Gilmore]

It’s supposed to change the RGB of the white sections when you manipulate their respective graphs. Basically allowing you to tint it to taste.

I did a test on a white rectangle with a RAMP applied to it, and it worked fine. But for some reason it has no affect on the comps in that file.

[Derek Gilmore]

Thanks for getting back to me.

After Effects CS6 running on Windows 7

I uploaded the project file to Google Drive:

https://drive.google.com/file/d/0B_NvcCw0OnFRRUdXX19DNGNZYnM/edit?usp=sharing