Import Palettes is a community add-on for Blender that brings color palettes into your project. Once installed, it sits under the File → Import menu, and it requests access to the directory where your color palette files are stored so it can read them.
The add-on was part of the Blender 4.1 bundled add-ons and is now offered as it is, with limited support. It was originally created by Antonio Vazquez and Kevin C. Burke, and documentation remains available on the developer's page for anyone who wants detail on the import process.
Version 1.0.5 was published in May 2024 and lists compatibility with Blender 4.2 LTS and newer. It is a small download at around 4.1 KB and is distributed under the GNU General Public License v3.0 or later. You can add it by dragging and dropping it into Blender or by installing it from disk through the extension preferences. It ranks 193 in the Blender extensions library and has been downloaded over 22,000 times.