How to get rid of Dark Mode


I just upgraded from version 6.10 to 6.30.
The new color scheme in the Sensor screen is virtually unreadable and the main screen isn't much better.
I don't use Dark Mode in the OS and don't allow any other apps to use their dark mode either.
How do I go back to something that is closer to the color scheme in 6.10 ?

Yes, I know that the lastest beta has improved Dark Mode. I'm not interested in improving it; I want to remove it.
The latest Beta has not only improved Dark Mode, but also a switch to disable it.