With suggestions that bluish lights disrupt our sleep, software that shifts screen white balance towards the red end of the spectrum in the evening—cutting back that potentially sleep-disrupting light—has gained quite a following. f.lux is the big name here with many people enjoying its gradual color temperature shifts.

"The users desired target color temperature (in Kelvin) for blue light reduction"

"automatically set based on sunrise and sunset" — Core (@tfwboredom) August 31, 2016

Apple recently built a color shifting feature into iOS, under the name Night Shift, and there are now signs that Microsoft is doing the same in Windows 10. Twitter user tfwboredom has been poking around the latest Windows insider build and found hints that the operating system will soon have a "blue light reduction" mode. Similarly to f.lux, this will automatically reduce the color temperature in the evenings as the sun sets and increase it in the mornings when the sun rises.

Signs are that the feature will have a quick access button in the Action Center when it is eventually enabled.

Little else is known about what features Microsoft has planned for the next big Windows update, codenamed Redstone 2. While the company has produced a few post-Anniversary Update builds for insiders, these have had little in the way of visible changes. Microsoft has only said that its current focus is on the operating system's internals rather than user features.