Strangely enough the image looks far better - as in more or less like it should - in Firefox (67.0a1) while she looks like Freddy Krueger's offspring (wrong colours, translucent areas which should be opaque or the other way around, etc) in Chromium (72.0 build 3626), both on Debian (Sid). I say this is strange as the author explicitly mentions she only expects it to look as it should on Chrome.