You must use a Nougat ROM that fully supports Substrate Themization! Works as well in stock / Rooted Oreo.
+ Play store
+ Pure Nexus settings
+ Pure tools
+ Root Explorer
+ Settings with custom icons
+ Backup and restore SMS
+ Spotify
+ SuperSU
+ Sync for Reddit
+ SystemUI
+ Telecom
+ Teleservice
+ Textra
+ Twitter
+ WhatsApp
+ Youtube
Supported Android
Download Substratum Spectrum Theme 17.2 Patched APK For Android