The theme supports the following systems:
-AOSP/Custom/Google ROMs from Marshmallow, up to Oreo 8.1 DP;
-OxygenOS Nougat and Oreo beta;
-Samsung Nougat stock system (including S series, Note series, A series and J series), but without dark notifications.
Black Stock Theme Stock Black Theme AOSP UI
"Substratum Black Theme" "Black Substratum Theme" "Black Theme Substratum" "Dark Substratum Theme"