Some ROMs requires the root, but some do not. We can not list all ROMs here as the list will be too long. You need to look at it yourself.
&Taurus; Installation / update theme: The theme is stable to use on ROM with supportum substratum. The substratum application on existing devices are not yet fully stable though, and if you are running for problems when installing or updating the theme please try to resolve this problem by erasing the data from Substrate, followed by a restart.
For More Info Google Play
Supported Android
varies with device
Download Swift Light Substratum Theme 1.6 Patched APK For Android