Create Own Theme Guideline
LibreOffice Theme Changer or LOTC (read: Lotis), is an extension to set the appearance of themes in LibreOffice. This extension was developed by the LibreOffice Indonesia Community. The LOTC source code can be seen in the Github LibreOffice ID repository. Following are the steps to create a custom theme for LOTC. Before you start creating themes, make sure you have installed this extension in your LibreOffice. The installation guide can be seen in at this link.