Default How to change the default background light color in the dark color on settings menu ?

I need advice on how to easily change the default background light in the dark on settings menu ?
Thanks a lot .

(already something here , but unfortunately no answers)

...FROM THIS LIGHT COLOR


...TO THIS DARK COLOR

HUAWEI ASCEND P6-U06
KITKAT 4.4.2 LIGHTNINGKAT
ROOT / TWRP RECOVERY
UNLOCKED BOOTLOADER