I have full confidence in you! Represents platonic love, faithfulness, loyalty and friendship. But also: support of the awareness of autism, love of water sports or expression of a fetish.
The blue heart emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the smileys and emotions category. Because the blue heart emoji has been around for quite some time, it should display correctly in the majority of operating systems.

Here you'll find a range of emojis on how they will look using different operating systems. Each company will design an emoji according to their own style. Here we have listed the most popular platforms around to see how the emoji will look on their screens.

Short Codes:

:blue_heart:

Hex Code:

💙

Decimal Code:

💙

Punycode:

xn--4r8h

URL Escape Code:

%F0%9F%92%99

JavaScript & JSON:

\ud83d\udc99

CSS Code:

content: '\01F499';