Thank you for posting on our forums website! Sorry to hear that you are getting discolored video while viewing the Slingbox with your DVR. The main cause of discolored video is due to bad cables. Have you tried swapping out the cables that you have going from the cable box to the Slingbox?
This article provided will further explain what might be going on
If you have any other concerns about this issue, feel free to respond back or give us a call at 1-877-467-5464. We are open seven days a week, 10:00am to 10:00pm EST.
The Sling Media Moderation Team