[fenwick67]

> In chrome they are on a blue background. I think other browsers might display them differently.

FYI, Unicode has two symbols, xFE0E and xFE0F, which explicitly requests the previous character to display as either a "text" (i.e. a solid vector) or "emoji" representation, respectively. These are well supported in browsers.

[raxxorrax]

I did not know that, this is pretty cool. Strange how browsers select the standard representation between text and emoji. Seems a bit random for some symbols.

[buckminster]

The Unicode standard defines which glyphs should get an emoji rendering by default. It is quite random. I think they made a mistake in applying this to existing symbols (like the media player buttons above) but that ship has sailed.