The custom notifier uses only the TEAL color for the buttons, not the accent color (if you are using a light theme).
Are you using the Companion to test the notifier?
If so, please post your results as tested on a compiled apk
I apologize, I did not immediately understand how to attach a screenshot. Yes, I am testing the application on a smartphone with android 9
It works fine for me, so I guess it’s a problem with your specific software. Can you share the details of your device ROM?
Tested; working for custom dialogues too for me.
Edit: Confirmed bug. Light theme indeed uses Teal instead of Accent Color.
I don’t think it works for custom dialogs last time I checked
Tested on miui 10 and on pure android 9. Tell me, do you use custom dialogs? I noticed a bug with them. It is also interesting that the text input dialog does not use accent color completely (screenshot above).
I did edit my post. Custom Dialogues on Light Theme do give that default AOSP teal colour. It’s a bug.