Hello Bill,
The scroll bars for the picture control are OS specific and as such, not editable from inside LabVIEW. To change them we will need to modify the OS's display settings. In Windows this is accomplished as follows:
1. Right Click on the desktop.
2. Choose Properties.
3. Click the Appearance tab.
4. You can modify the OS colors from this screen.
The other option we have is to hide the scrollbars and use LabVIEW slider controls to programmatically scroll the control. With this method we can customize the slider controls to our liking.