a lot of what I heard was that it’s easier on the eyes—i.e., they found the dark background to be less harsh than the bright white background when looking at their phones at night. But while a ...

The blog also notes that WhatsApp uses night blue colour in the background and dark green colour for chat bubbles. WhatsApp uses night blue colour in the background and dark green colour for chat ...

and the background. Maximum contrast is black versus white, but this combination can be considered too overwhelming (it might cause glare). Other colors can be used—such as navy, dark green, or maroon ...