Be sure to change this setting to full range in the TV Output section! It will let the Switch use the full RGB range on your TV/Monitor, making the image have better,
Should I Use RGB Limited or RGB Full on My PlayStation or Xbox?
TechSpace :: Knowledgebase / How to Avoid Washed Out Colors When Using HDMI on Your PC
Should I Use RGB Limited or RGB Full on My PlayStation or Xbox?
Xbox X won't allow 2160P 60Hz RGB to my PC Monitor whereas PS4 - Microsoft Community
Guide: How to set up PlayStation 5 for 4K, 120Hz, HDMI 2.1 & HDR - FlatpanelsHD