Thing is, i'm currently trying to create a tool for legally blind people (specially with Retinitis Pigmentosa). They would benefit from some kind of color invertion (A smart one). To achieve this, i thought of applying some color matrices over the screen so the apps that aren't compatible with OS's dark mode can still be dark.
I have done some research and i'm not sure if this is possible. I know that normally you can't access other app/system views because of signature permissions, but is there a way to achieve this using the accessibility services?
It's not possible to affect the display pipeline from an accessibility service that's why there are various color corrections available directly as Android features.