Dell S2415H Monitor - Manual (Page 32)

32 | Operating the Monitor
Color Use the Color menu to adjust the color setting mode.
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 MHL devices using the MHL cable.
YPbPr: Select this option if your monitor is connected to a DVD player
by YPbPr using HDMI cable; or MHL devices by YPbPr using the MHL
cable.
Or if the DVD (or MHL devices) color output setting is not RGB.