With all that said, I still don't think you'll have any issues as long as you update your bios to the latest version. I don't even see your specific color listed. Compatible Components (from 1,875 PCs) Popular components in PC builds with the Asrock X370 Killer SLI/ac Motherboard. I bookmarked a link recently when researching Samsung B-die chips after hearing they worked best with Ryzen. One would think that the colors wouldn't matter, it should all be the same underneath, but I'm not so sure.
My F4-3000C15D-16GVKB kit isn't on my ASRock AB350 Pro4 QVL, but I've had no issues with it.
Each new bios release will contain better memory support. ASRock X370 Killer SLI/ac AM4 AMD X370 SATA 6Gb/s USB 3.0 HDMI ATX - ASRock (147 reviews) Add a product review (Change region) Buy now. Just because they haven't tested it, doesn't mean it's not going to work. Compatible Memory with ASRock X370 Killer SLI/ac.
Do you have this board, and are speaking from experience? I emailed Asrock in regard to this same question, and the response I got was basically "if it's not on the list, it doesn't work" I'm not sure if the person who responded was just giving me a brush off or what, but it instilled a lot of concern for me lol