Expression to control Channel Range (in Hue/Saturation)?

[JeangJenq Loh]

I’m trying to make multiple layer’s fill color brightness change gradually by using index expression with some sort of lightness control. I’ve been trying to add expression on the fill color, by converting them to HSL and change the hsl[2] according to index, now I’m trying to use the master lightness value in Hue/Saturation to do that instead, but as Channel range controls Master Hue, Saturation and Lightness all together, I have no idea how to add expression on it that only controls Master Lightness. I thought it would be an array as it contains 3 values on it, but it’s not. Anyone know how this works?

[Dan Ebberts]

Unfortunately, that property has a property value type of CUSTOM_VALUE, so you won’t be able to access it with an expression.

Dan

[JeangJenq Loh]

Ah that explains it. I’ll fall back to using the rgbToHsl then,
Thanks Dan!

[Joe Clay]

You could also try this. Just set your output colors to vary in brightness only. I prefer this method over rgbToHsl if I can use it.

https://workbench.tv/tutorials/2016-06-17_ColorCycle/

Joe Clay
Workbench.tv

[JeangJenq Loh]

Thanks for the suggestion! However I’m trying to control my final output color using a fill effect on a null object? And I can’t put use expression on Colorama output cycle either.

[Joe Clay]

So you’re trying to take that color from the fill and apply it to other layers? If that’s the case, unfortunately Colorama won’t output a color that you can apply to other layers.

On any color parameter, you can add this kind of expression.

hsla = rgbToHsl(value);
hsla[2] = .3; //change this value, link it to a slider or whatever
hslToRgb(hsla);

Joe Clay
Workbench.tv

[JeangJenq Loh]

Thanks Joe! That works!

Thanks Joe! That works great!

[Joe Clay]

Awesome! You’re welcome!

Joe Clay
Workbench.tv

[Ze’ev Gilad]

This is great, thanks! But why can’t I do something like:

hsla = rgbToHsl(value);
newColor = hsla * [1, .5, .5, 1];
hslToRgb(newColor);

This gives me error “one argument must be scalar.”

[Dan Ebberts]

You’re telling it to multiply two arrays. Try it this way:

hsla = rgbToHsl(value);
newColor = [hsla[0],hsla[1]*.5,hsla[2]*.5,hsla[3]];
hslToRgb(newColor);