Hey there, I'm just curious how the custom tier colors options work in multiplayer situations. Would there be a desync if two players have conflicting tier color settings? Is it possible for the entity colors to appear differently from each player's perspective depending on their settings, or are they forced into a particular color set, either default or custom, in such scenarios?

Unfortunately the way the settings work in Factorio, they must all be synced. You can have custom colors, provided everyone also has the same custom colors. :[

Oh bummer, but that's what I expected. Thanks for the quick reply!

Yep. I'd have them be player-driven, but there's no way to specify the tints on that basis for this use case.