This instruction applies to TVs connected to the HDMI connector on the graphics card.
To change the HDMI colour format for your TV
From the NVIDIA Control Panel navigation tree pane, under Display, click Adjust desktop colour settings to open the associated page.
If you have more than one TV connected through the HDMI connector, click the icon that corresponds to the TV that you want to change.
Click the Digital Colour Format list arrow and then click the colour format you want to use.