I want to customize a style that can be selected in dashboard properties.
Have you tried this?
OBIEE Styles/Skin
Try this:
http://docs.oracle.com/middleware/1221/biee/BIESG/answersconfigset.htm#BIESG1311
Hello Dongxi,
Please mention the version of your OBIEE. I assume it is 11.1.1.9.X + (Looking at Skyros default although it is an assumption).
If it is 11.1.1.9.0 Then please follow - https://docs.oracle.com/middleware/11119/biee/BIESG/answersconfigset.htm#BIESG9188
If it is 12.2.1 Then please follow - http://docs.oracle.com/middleware/1221/biee/BIESG/answersconfigset.htm#BIESG9185
This one seems to be dated and obsolete but can be used for reference:-
Creating and Developing Custom Styles, Skins, and Messages in Oracle BI EE 11g
Thanks & Regards,
Avi