🎨 Visual Update: Hover background colors now match the real pet palettes.
Almost every pet-color hover background has been retuned to use the actual hues from its namesake pet — Galactic is now navy with starlight instead of bright magenta, Nightmare is monochrome grey instead of purple, Arid is the real pink/grey palette instead of yet-another-tan, Spectrum is the soft prismatic gradient from the spectrum pet instead of a harsh saturated rainbow, and Darkmatter gets back its signature magenta highlight. Massive thanks to [user=Syfyri] for sampling palettes directly from the pet art and posting a side-by-side breakdown in the forums.

🔍 Improvement: "Sync from achievements" button retroactively unlocks backgrounds.
If you've ever owned a colored pet — even years ago, even before this feature shipped click "Sync from achievements". The site checks your pet-color achievement history (the "Have a Sweetheart Pet" / "Have a Galactic Pet" / etc. lineup) and unlocks every matching background. The sync also runs silently every time you load the cosmetics page, so most players will arrive to a freshly stocked grid without having to push the button at all.