It's not a bug, that's just where the visible spectrum ends. There's a bunch of different shades of ultraviolet following that purple line. Just don't read far enough down a comment chain to stare at the gamma-ray-colored ones.
rmayayo@lemmy.world if I click on this link in boost, it opens in the browser, and then when I share from there, the only boost related action I can see is to create a post. Would it be possible to have an action to "handle" the link and open the thread in boost? Eternity has this capability, fyi :)