Panel colors with maximized windows

Panel and dock share same color and transparency

transparency 1% (with screenshot application behind the top panel)

darken(headerbar color, 2%)
darken(headerbar color, 4%)
darken(headerbar color, 6%)
darken(headerbar color, 6%) in backdrop. It looks to me that a very dark top panel does not look good close to windows in backdrop
lighten(headerbar color, 6%). Too much “stripes” effect IMO