That looks like a great colour match!
Kai, I suspect you might be thinking ill of my previous remarks, but I certainly had nothing derogatory in mind.
I work with "color" on a near daily basis at work. I'm pretty meticulous about identifying even the smallest differences. If you scroll up an examine his original photo of the full height of the machine, it is easier to spot the very slight difference between the Mac's housing color and the 3D printed part. Knowing how color changes over time on old Macs (usually in the form of Apple Platinum changing to varying shades of yellow), I pretty much knew the machine was probably de-yellowed at some point and wanted to confirm it. Sure enough, it was indeed RetroBrighted. That explains the very subtle difference in brightness.
What this means is, if you have a Platium Mac Plus that is yellowed, you obviously would need to Retrobright it before you start printing plastics and expect things to match. But in my own experience with RetroBright, plastics sometimes come out a shade lighter than the stock plastics.
For example, I deyellowed an Apple keyboard once which was pretty yellowed on the top, but hardly at all on the bottom, and none on the inside. After deyellowing, the top was a very tiny shade lighter than the bottom, and the inside was very slightly darker still. Not a huge difference at all, but not 100% identical either.
None of this dialog is meant to say anything negative about the filament. I think it's fantastic Joe went the extra mile to create it. I am merely pondering "color matching" in light of what each of us would consider to be "good enough." And yes, I do think the color matching shown to us by
@asphaise is truly "a great colour match"!