Inspired by an offhand comment Alice (@foone) made earlier today: the CGA iceberg
@curtmack @megatronicthronbanks
this might blow your mind but the brown circuit is not on the CGA card.
it's in the monitor
@curtmack It was only added to the digital RGBI 5153 monitor, so you wouldn't see brown in composite mode.
dark yellow kind of looks like pea soup or baby vomit
Sooo many compromises, because hardware was expensive and things weren't that miniaturised yet!