On different mastodon instances Julia users added the three colored dots to their username. In the page source it appears as :julia:, but I cannot display this emoji as \julia. How to generate it?
Thanks!
Unicode or tab definition for the three colored dots representing Julia
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Julia REPL uses Unicode characters that you can enter using \ followed by style similar to LaTeX. However, there is (not yet) a special unicode character that represents Julia logo. When people write on forums :julia: this gets replaced by an icon (not a character) but in Julia REPL only Unicode characters are available.
Having said that, there is a page devoted to the logo of Julia language you might want to have a look at: https://github.com/JuliaLang/julia-logo-graphics
Przemyslaw has it right, but while there's no official Unicode character for Julia (and I wouldn't hold my breath on this one...), Unicode has a "private use area" which allows fonts to define their own characters.
The JuliaMono font makes use of this to provide a character for the Julia dots, as well as other Julia related things.
https://juliamono.netlify.app/