A new theming solution, the UI Theme Designer, is available.
An easy to use, comprehensive theming solution
Built-in support for importing previously existing custom themes
Support for .less dynamic stylesheet language files
Upgrade-safe, manual editing of design files directly in the Web Resource Repository (rather than through the UI Theme Designer)
Supported in all HTML5 compatible browsers
You can enable the new UI Theme Designer in SAP NetWeaver Administrator, or continue to use the existing Theme Editor.