It's really not to be alarmed. It's a function of how different browsers (and different versions of browsers) interact with non-web-safe colors. The fact is that if we restricted the artistry of Billie to web-safe colors, we'd restrict very much her palette. So there's not much to be done but to accept some element of subjectivity in the presentations, for the present, until they get these internet browsers to behave with better predictability.
Another thing that controls the colors one sees is how your color settings are (right-click on the desktop and click *properties* to see where yours are set - mine *are* set the highest true colors, but some monitors have the option of 256 colors, 16 bit, 24 bit or 36 bit)
Dolly, that's also where you set your screen resolution.
Well, whatever the colors, we all agree that it's pretty and once again Billie has received and A+.