I know original Adapta-gtk-theme exists as a snap, I use it
Even if no longer maintained, it remains one of the most accomplished theme. But is only provided in one color.
Adapta exists in variant colors → https://github.com/ivankra/adapta-gtk-theme-colorpack that matches the variant folder colors of Papirus icons ( and soon even a Yaru one ).
Wouldn’t it be nice to have all these colors available for snaps ?