Tamas Nagy

I must admit that would be pretty slick. I would be happy to review a PR, but I'm unlikely to have time to do this myself.

It's been awhile since I've looked at Gadfly's codebase. Why does the new statistic need to be a separate layer? Shouldn't it be applied prior to any of the geometries?...

Interestingly, this seems to work: 

I should've played around with the code more. It turns out you can't use unitful aesthetics with `Geom.ribbon` and that's why I was having issues when applying it to my...

Can confirm this on Gnome 3.36 on Fedora 32 (using Wayland). Program freezes a couple seconds after start and then gnome offers to kill it.

> If they are different, which values do you assign to the newly-generated colorants? What is they in this context? I'm starting to doubt that I would need to call...

Ah, I see what you mean. Assign the alpha values to the new color most resembling the color they belong to in the seed-vector?

The `MethodError` is unfortunate though. Currently, when trying to use your own set of colors to `Scale.color_discrete_manual`, `distinguishable_colors` is always applied to the input. I guess one solution would be...

Is that the best behavior though? You want to use some RGBA values in your plot and Gadfly errors out and tells you that you can't give alpha values? That...

Note: I'm changing what I'm saying here from the OP. I don't think we should make any changes to `Colors.jl`, only that I shouldn't call `distinguishable_colors` when the user supplies...