Allow color style variables in Effects settings

Please allow us to select from color styles when setting the colors on effects.
Currently, we can only apply hex, rgb, etc. to shadows. Since we’ve taken the time to define all the colors of our design palette in styles, it would be very helpful to have access to them in any feature that assigns a color.

Also, our development system is specifically designed around color variable that match our styles. Without the style reference, the generated specs become less effective.

Already requested with a broader scope.