Cool! I'll have to check it out.
Many years ago, I used to use the Kulor website, which had tons of color palettes, allowed you to extract palettes from images, and if you signed up, it managed a library for you. It even had a neat map to show you what the most popular palettes were by country.
Adobe bought the website and renamed it to just Color, but parts of it are still free. I think what went behind the CC paywall was the library and some of the analysis tools. I just checked by logging out of my CC account, and, yeah, parts of it remain free. Link:
Color
However, I had switched over to a third-party app for a while...can't remember why, but somehow I found this app more useful than the Adobe site. I was doing a lot of web design stuff at the time so that might have something to do with it. I don't have it installed on my current computer, but I'm sure I have it in my software library. Will check and BRB with info.
Oh, and regarding a universal Color Picker (sort of discussed in your other thread) many years ago, I had an alternative color picker called Jovian Color Picker that did everything, and it worked with just about any program. (From what I recall, anyway.) The program was purchased by NewTek and integrated in LightWave 3D, but unfortunately, they dropped support for the standalone general-purpose version. I continued to use my old license for years, but I don't have it installed on my current computer, and I wonder if it will even work in Windows 11. (Probably not well if at all...this must have been back in Windows XP or 7 days.) Sadly, I'm not aware of anything like it for modern computers.