Dell S2330MX Monitor - Manual (Page 24)

Input Color Format Allows you to set the video input mode to:
RGB: Select this option if your monitor is connected to a computer or DVD player using the HDMI cable or the HDMI to DVI
adapter.
YPbPr: Select this option if your DVD player supports only YPbPr output.
Preset Modes Allows you to choose from a list of preset color modes.