This Oxy Toolbox module is for managing already existing user-created custom Stylesheets at Manage > Stylesheets area of the Oxygen editor outside the editor, i.e., in WP dashboard.
The available colors will be shown above the editor and a color can be inserted at the current cursor position by clicking on it.
Checks are included to handle CSS caching and Oxygen editor being open (Edit Locking).
Stylesheets Editor shows a warning message if Oxygen editor is open.
It is not possible here to