While online, you can take a screenshot of your palette or download it as a JPEG/ASE file to reference locally later.

Adobe does not offer a downloadable "Adobe Color" installer for offline use. 🛠️ How to "Use" it Offline

Tools like WebCatalog allow you to "install" the website as a desktop app, but these typically still require an internet connection to load the site's content. Adobe Color: Color palette generator

The main tool must be accessed at color.adobe.com .

Once a theme is saved and synced while online, it is stored locally as part of your library cache. You can then open the Libraries panel in apps like Photoshop or Illustrator to use those colors without an active connection.