You can use OKLch and APCA with that huetone website. See the gear icon in top right.
I don't think your efforts are obsolete though, the 2 approaches could be combined IIUC your approach is based on computing values based on color science, and the tool/website is a more visual approach, it won't design the colorscheme for you, but you can use it to validate the colorscheme, or tweak it after the fact.
I don't think your efforts are obsolete though, the 2 approaches could be combined IIUC your approach is based on computing values based on color science, and the tool/website is a more visual approach, it won't design the colorscheme for you, but you can use it to validate the colorscheme, or tweak it after the fact.