moongfa,
The Touch of Color designs in several of Samsung Series of televisions is a subtle design, which has no light effect whatsoever.
You're certainly not doing anything wrong; it's that the Touch of Color is a subtle addition to the design.
--HDTech
I keep reading about other people's experiences with the touch of color on the LN52A750. Unless I place a light behind my unit, you can't see the red border on mine. Am I doing something wrong? I can't find a place to turn it on/off in the settings.
Thank you for any help you can offer.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic