Elon Musk has officially changed Twitter’s logo from the iconic blue bird to a black-and-white “X” – the latest big change since he bought the company for $44 billion last year.

The jump to black-and-white branding is ... and swapping the purple tones for blue ones. Notably, the dotted "a" in the middle of the Max logo evoked another dotted logo vowel: the "O" in HBO.

Musk said in a post on Sunday he wanted to change Twitter's logo and polled his millions of followers on whether they would favour changing the site's colour scheme from blue to black.