To customize the look-and-feel of BI Publisher, Oracle strongly recommends that you use the custom style provided in the bicustom-template.ear file as your starting point. This custom style is a copy of the Skyros style.
For more information, see Modifying the User Interface Styles for BI Publisher.
Most of the common Skyros styles and image files, including the style sheet (master.css), are contained in the master directory. For more information about the master directory and its structure, see About Style Customizations in System Administrator's Guide for Oracle Business Intelligence Enterprise Edition.
Within the master.css style sheet, each element (or class) that is available for update is documented in the comments.
Other style sheets are also contained within the Skyros style and skin folders. You are not likely to need to update these files unless you are creating an advanced custom skin that provides styles for each detail of the user interface.
Note:
The Skyros style does not apply to Administration pages in BI Publisher.