XPS 15 Late 2013 - How to turn of splendid color

Hi there,

I just got my new dell xps 15 and it's great, but I need to turn off Splendid color mode to properly calibrate the monitor, following this article: http://www.anandtech.com/show/7883/dell-xps-15-qhd-revisiting-the-lcd-results

However, when I open Windows Mobility Center, I do not see the "Customized by Dell" options, so I can't turn off splendid mode. Can anyone help here? I'm running the standard Windows 8.1 that shipped with the computer.

I also updated my drivers using the Dell diagnostic, and everything is up to date.

Eric