When I search on a word or phrase on the end-user pages, can the keywords be highlighted somehow? 

Environment:

Oracle B2C Service Customer Portal (CP) Version CPv2 and CPv3.x

Resolution:

In CPv2 or CPv3, the highlight attribute must be enabled on the widget that is used to display results (for example, Ouput/DataDisplay or Search/KeywordText2).

To edit the color of the highlighting, the user must edit the background color in the themes/{YOUR_THEME}/site.css file.

For example:

/** general search term highlighting **/
.rn_Highlight
{
      background-color:#FFFF00;
}

For information on how this feature works, refer to Answer ID 7838: How do search results on Customer Portal get highlighted?.