Help with scheme entries affecting rarea plots using marginsplot

[Alan Neustadtl]

I am trying to create a scheme that changes the intensity, opacity, or color of a marginsplot when the confidence intervals (CIs) are recast as a rarea plot. In the first plot created by the code below you can see the outline of the CIs recast as an area. In the second I changed the opacity so they are not visible.

Can someone point me to the scheme entries that control the line color or line width of rarea plots so I can make this behavior the default in my marginsplots?

sysuse auto
regress mpg weight
margins, at(weight=(1800(25)4825))
marginsplot, recast(line) recastci(rarea) ciopts(fcolor(*.5)) name(g1)
marginsplot, recast(line) recastci(rarea) ciopts(fcolor(*.5) lcolor(%0)) name(g2)

Graph G1:


Graph G2:


Best,
Alan