"Legend" layers filter patch to match layer colors with transparency

Idea created by deleted-user-c3U2DcNBhtqn on May 2, 2019
    Not in Current Product Plan

    In some maps, my layers use a transparency which requires a separate layer for darker outlines which offset the transparency. As a result, I have to copy/paste the layer into the data frame again so that I am able to produce a legend that also incorporates the dark outline into the patch symbol. As a result, rather than adding a transparency to the "legend" layer, I am stuck hand-choosing colors to match the color ramp (with transparency) in the original layer. Would it be possible to incorporate a feature that filters the legend layer patches to match the transparent color ramps?