https://www.techradar.com/news/looks-like-whatsapp-may-be-getting-a-dark-mode

Dark Mode for YouTube has come to Android in the last few months, and it looks like a similar feature will be coming to ease the stress on your eyes within WhatsApp soon.

WhatsApp has yet to have a dark mode on either iOS or Android, but it looks like the new setting will be coming to both platforms in the future. This is all according to a Twitter account called WABetaInfo.