Yes, using the settings put secure reduce_bright_colors_level 100 command on Android will persist the value even after a restart. This command modifies a secure setting, which means it will remain in effect until changed again1.

Is there anything else you'd like to know about Android settings or debugging?Go to developer mode
tab build 10 times
system
usb debugging

plug usb into computer and other end to phone

on linux
ok@ok:~
$ adb
Command 'adb' nYes, using the settings put secure reduce_bright_colors_level 100 command on Android will persist the value even after a restart. This command modifies a secure setting, which means it will remain in effect until changed again1.

Is there anything else you'd like to know about Android settings or debugging?ot found, but can be installed with:
sudo apt install adb
ok@ok:~
$ sudo apt install adb
ok@ok:~
$ adb devices
* daemon not running; starting now at tcp:5037
* daemon started successfully
List of devices attached
ZY22G9DQNP	unauthorized

CHOOSE ALLOW ON PHONE

ok@ok:~
$ adb devices
List of devices attached
ZY22G9DQNP	device

$ adb shell
tonga:/ $ settings get secure reduce_bright_colors_level
90
tonga:/ $ settings put secure reduce_bright_colors_level 100                                       
tonga:/ $ settings put secure reduce_bright_colors_level 120                                       
tonga:/ $ settings put secure reduce_bright_colors_level 130                                       
tonga:/ $ settings put secure reduce_bright_colors_level 130                                       
exit


Yes, using the settings put secure reduce_bright_colors_level 100 command on Android will persist the value even after a restart. This command modifies a secure setting, which means it will remain in effect until changed again1.

Is there anything else you'd like to know about Android settings or debugging?