The Light of Command
Star Adder war machines are painted black and deep blue.
Per FM:Crusader Clans, page 118.
All Adder 'Mechs and fighters bear the Clan insignia on the left arm or wing and right leg or empennage. Galaxy insignias are displayed on the right arms or wings and left legs or empennages, while Cluster insignias are worn on the right torsos of 'Mechs or the fuselages of fighters.
The Command Keshik's banner shows a white four-pointed star resembling that of the Star Adder insignia, but without the snake.
Per FM:Crusader Clans, pages 118 and 122.