Background Color Highlight
From SAP Enable Now Wiki
Scope
Purpose
This property is used to specify the color that a 'segment' in the puzzle 'solve' grid should be filled with when the user drags a puzzle piece over it, ready for dropping. Note that this is only applicable if the Puzzle object's Interaction property is set to Arrange in Second Field.
Use
You can either click on the colored square to the left of the property field (which shows the current color) and select or specify the required color in the Color Chooser dialog box, or you can enter the RGB hexadecimal color code directly into the property field. Alternatively, you can click on the checkered square on the left of the property field to set the background color to transparent.