Change the Color of Multiple Layers With Change to Color Effect

Hello,

I am trying to change the value of many shape layers based on one adjustment layer which controls the main colors and a hue/saturation/lightness expression.

Here's what I am working with:

Adjustment layer:
Color A on Shape layer A is pick whipped to the "Color Control" Effect called "A Color".

Then I added a "Change to Color" Effect, where I want to make the global changes to all the shape layers values via Hue, Saturation and Lightness. I am assuming that once I have the expression for Hue, I can copy and paste it to Saturation and Lightness.

Right now I have the following expression attached to the Change to Color - Hue.

color = effect("Change Color (Global)")("Hue Transform")
change = .2;
convert = rgbToHsl(color) - [0, 0, 0, change];
hslToRgb(convert);

I really want to use expressions to do this effect and am wondering what I am doing wrong. I get the following error:

After Effects warning: Bad method arguments: argument 1 to rgbToHsl() must be of dimension 4
Expression disabled.

What am I doing wrong?
Thanks in advance.

-Dorian

Okay, thanks! How exactly would I do that?

Thanks,
Dorian

Thanks for the idea, unfortunately I'm still getting an error.

Here it is:

After Effects warning: Bad method arguments: rgbToHsl() needs exactly 1 argument
Expression disabled.

Thanks,
Dorian

Cassius,

You were right, I did forget the quote marks. But now, I am getting a divide by zero error, (arg)! I have changed the values from 0 to 1 and random numeric values but still to no avail:

color = effect("Change Color (Global)")("Hue Transform");
change = 1;
convert = rgbToHsl("1,.3,.6,color") - [1,.2,.4, change];
hslToRgb(convert);

Thanks for all your help!
Dorian

Hmmm... That is weird I am trying to get the shape layers Hue to be controlled by one central Hue control, based on expressions. I have the following expression:

color = effect("Change Color (Global)")("Hue Transform");
change = 1;
convert = rgbToHsl("1,2,3,4color") - [.2, 2, 2, change];
hslToRgb(convert);

This one is with quotes, and I get the following error:

After Effects warning: invalid numeric result (divide by zero?)
Expression disabled.

Then without quotes and just "color":

color = effect("Change Color (Global)")("Hue Transform")
change = .2;
convert = rgbToHsl(color) - [0, 0, change];
hslToRgb(convert);

error:

After Effects warning: Bad method arguments: argument 1 to rgbToHsl() must be of dimension 4
Expression disabled.

Then with just numbers:

color = effect("Change Color (Global)")("Hue Transform")
change = .2;
convert = rgbToHsl(1,2,3,4) - [0, 0, change];
hslToRgb(convert);

After Effects warning: Bad method arguments: rgbToHsl() needs exactly 1 argument
Expression disabled.

So I do think it needs quotes. But I can't seem to figure it out..

Here is the .aep, maybe you could look at it and tell me what I am doing wrong:

http://dl.dropbox.com/u/17788937/Test%201%20copy.aep

Once again, thanks for all your help, I really appreciate it.

Cheers,
Dorian