Expression that references fill color and adds or subtracts brightness?

Question

Hey,I'm looking to create an expression that I can add to my bevel "highlight color" and "shadow color" that will reference the fill of a layer and automatically make it brighter by a bit (for highlight) and a version to make it a bit darker (for shadow).I'm assuming I can pickwhip the fill, and then add to that or subtract from it (I'm presuming some sort of array that references the color value?), but I'm not trained enough in expressions to do that.Thanks!

Dan Ebberts · Accepted Answer

It might be a little different, depending on how you have things set up, but it could be something like this for Highlight:

c = content("Rectangle 1").content("Fill 1").color;

hsl = rgbToHsl(c);

factor = 1.25; // 25% brighter

newL = Math.min(hsl[2]*factor,1);

hslToRgb([hsl[0],hsl[1],newL,hsl[3]])

and like this for Shadow:

c = content("Rectangle 1").content("Fill 1").color;

hsl = rgbToHsl(c);

factor = .75; // 25% darker

newL = Math.min(hsl[2]*factor,1);

hslToRgb([hsl[0],hsl[1],newL,hsl[3]])

Dan

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