Solution : https://service.sap.com/sap/support/notes/589816 (SAP Service marketplace login required)
Key words : 
web item role menu, 0b            import support package 10, 1c            import support package 04, role menu reason, bw web application, bw web analysis, symptom incorrect colors, bgcolor= class='sapbextxtstd', terms business explorer, bw support packages
Related Notes : 
       
| 539821 | SAPBWNews BW 3.1 Content Support Package 04 | 
| 523245 | SAPBWNews BW 3.0B Support Package 10 | 
| 446015 | Web item role menu | 
| 444247 | Customizing BW 2.0B/2.1C/3.0A or higher for Portal 5.0 |