It's really good to have an dark mode natively but if you looks at XDA developers exist some guys who are doing right now apps (open source) in a real black mode, they calls them "pure black" or "black amoled" for use their properties from the same displays for save battery and cause it's look really good (like this https://drive.google.com/file/d/1ukRmx6zK28hvdpfHAIgCGCYkeiprEath/view?usp=drivesdk ) taken from Retro Music player who is open source. It's just an idea but, man, apparently users loves the pure black style c:
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