Does fitbit provide a sleep-friendly lighting option?

[FidRewe]

The clockface of my versa, as it is, has a quite high intensity of blue wavelengths. It is well-known that blue light after sunset and while sleeping is very detrimental to the body's circadian rhythm and therefore the ability to get really good sleep. As I'd like to look at my watch after 7 pm and also use it to check the time, when I wake up during the night (for lucid dreaming), it would be very important, to have a built-in feature, which can be used to reduce the color temperature during the evening and the night, like f.lux does for the computer. Imo this should be a basic feature of every "fitness" watch, but it doesn't seem like fitbit has it. Is there an app that accomplishes this adaptation to the day-night cycle?

[emili]

you can change the brightness of your tracker in the app to dim. There is not a feature currently that has adaptation like your cell phone when it is in sunlight or dim lighting