You can create a custom terminology file with name, color, standard terms to describe what the segment contains (category, type, modifier, anatomic region, etc. - see DICOM standard for segmentation storage) and import and use that in the Segment editor’s terminology editor. See examples of terminology files in your Slicer installation in share\Slicer-4.13\qt-loadable-modules\Terminologies subfolder.
You may also find this topic relevant: Segment editor : specified terminology item in settings is partially taken into account