It stands to reason that, like a Valentine's Day heart, a red heart emoji means love. But what does a white heart emoji mean? And how do you use it?

In episode two, DI Luke Bascombe, played by Ashley Walters, learns that he completely misinterpreted a series of emojis left ...

You can change the color of some emojis by combining them with a colored heart. For instance, you can combine a blue heart ...

Though the animation effect was initially thought to be reserved for just the red color heart emoji, the folks over at WABetaInfo have suggested that it could now extend to other WhatsApp emojis.