GM factory visible carbon fiber is a brownish tint with a hint of purple—not yellow—and a 3k-twill weave. If you install side skirts and splitters, any aftermarket parts you add will not match UNLESS you specifically order parts as described in my first sentence. I am aware of only two vendors who offer this: TKO Performance and directly from Nowicki—not through a middleman. TKO Performance has a very limited number with option to match GM. Nowicki will tint to match GM any parts displayed on their website. There is an up charge for this service.

I am very pleased with appearance of VCF option. I hope this helps. Good luck in your decision.

I just read second part of your question regarding ordering aftermarket. I was not aware Factory VCF was not black and had a specific twill.
I ordered VCF spoiler and rear diffuser from C7Carbon. Doesn’t match;
Hood extractor from RPI. Not only doesn’t match color or weave but it flows opposite of hood insert. They were wonderful and have allow d me to return it to APR;
Anderson Composite wheel flares. Doesn’t match and was very distracting due to part extending down behind canard on front splitter—two, different weaves and colors.
I purchased Stage 3 canards from a fellow forum member. They are glossy black and a different weave. Therefore, same issue as wheel flares.

I have a couple of pics on my phone of RPI/APR Hood Extractor installed next to my factory VCF Hood insert, if anyone would like me to text to them. I struggle with uploading pictures onto this site. It always says “file too large.”