Use APKPure App
Get MiX AMOLED Cyan old version APK for Android
MiXplorer के लिए AMOLED सियान थीम।
A black theme with cyan accents for the MiXplorer File Manager with new high quality icons and optimized colors for AMOLED screens.
"This is not a standalone app. It is an installable theme for MiXplorer which is available here:"
https://forum.xda-developers.com/showthread.php?t=1523691