Brushed Celestial Gold is matrix gold; it's the same color tone reconstituted as a clear coat to work on a brushed wheel. It does present as lighter given it's brushed and the aluminum comes through the clear.
Celestial (on the car) next to matrix (not on car). Neither are super clean but I think this shows it.
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I have been trying to get better samples of the colors for a bit. I think it may come eventually. They had one ready for me when I was there but a few didn't come out right so I left without them.
I have most of the golds on wheels in my garage (I have Brushed Light Gold (Gloss), Brushed Celestial Gold (Satin), Brushed Champagne (Satin), and Matrix Gold). I also have better pics of Brushed Bronze and Rich Gold (an underrated color imho) from when I saw them while I was there. I will post some of it soon (including videos of the whole process, which are awesome btw). It's all on my camera and I have been super busy with a few things lately so haven't even taken the stuff off the memory card yet.
I am actually trying to mix something specifically for the 33 Wheel. The process to mix a new color is long though. I hope to have it soon-ish but there's really no timeline for that process.