These are my takes on alternate Sync logos for Lemmy (I made that rat from a while ago)
The logo for Sync is so tied to Reddit for me personally, that it was hard to think of ways to translate it to Lemmy (or the Fediverse overall).
Orange and Blue are signature colours for Reddit, but Lemmy doesnt necessarily have a colour scheme. Nor should it. that's up to the instance operators to choose, making their community unique.
I also like the general Fediverse pentagon logo, but it can look quite busy...
I did what I could. I'm an average designer at best ¯_(ツ)_/¯
Bottom right is cool in a vacuum, but there's like... a shade of swastika to it? I dunno, maybe that's just extremely online of me, but I'd be a little hesitant on it for that reason as compared to middle bottom.
The one that strikes my fancy the most is middle right, maybe just because it reminds me a little bit of Strava. Maybe the Fediverse colors could be applied to that one in some way, maybe teal and blue on top, red and orange on bottom, and purple as a fill? Or blue and purple on top with teal as a fill. In my head that looks cool, but in practice it might look like total ass. Worth trying anyway imo.