It's pretty clear that it's "Based on the Farnsworth Munsell 100 Hue Test," and "this is not a replacement for the full test!" I think if you did particularly poorly on the online test then it's worth looking at whether you need to do the full test, as you might have colour blindness (or a terrible monitor). But a perfect score isn't super-meaningful.

Looking at this test on my monitors I would bet it's the 'terrible monitor' before color blindness by a longshot, one shows pretty good color the other is entirely washed out.