This is the kind of note I was hoping for. Standard pigment codes (PR170, PR254 etc) are a good call and I wanted a proper Color Index field and this pushes it up the list. I will also take another look at the Van Dyke Brown swatch. You may be right that it reads too close to burnt sienna. Chromatopia looks like a lovely book and thanks for the Langridge pointer, glad those artisanal makers are still going.

Fair hit and I should have done that from the start. There is a person behind this and the About page is now updated (https://storiedcolors.com/about). Short version: I'm a technical architect who painted as a kid, stopped for years, and started this to get back into it. I do use AI to draft the entries and I'm not going to pretend otherwise but I check every one against named, non-Wikipedia sources and cut what I cant source. You shouldn't take that on faith so the methodology and the citations are there to check and there's a corrections address when I get something wrong. I totally get the "put together by an LLM" reaction on how it felt. I'd rather try and earn the trust back than argue about it.