As far as I know, neither Forgejo nor Gogs offer a hosted version, but Gitea does.
Forgejo hosted version is https://codeberg.org/ which is my code forge of choice. I also have a self hosted private forgejo mirror of my public codebeerg repos.
The colorscheme I am using is Tokyo night storm. GTK theme and icons are in AUR. However for icons I use themix (from aur) and suru++ aspromauros (also in aur) to creat the icons
Its deadbeef