(Sorry for scuff lol, feel free to edit)
It's a reference to war of the 3 kingdoms, and this is a screenshot edited from dynasty warriors.

Colors of Regions:
Dokibird: Yellow
Neuro/Swarm: Pink
Filian: Light Purple
Hololive: Light Blue
Ironmouse of Vshojo: Dark Purple
Indies: Green
Phase Connect: White
Nijisanji: Orange