That’s… interesting.
Among the Tulari, the blue-and-silver was the colors of the Endras’tai, what you might call the Royal Guard or Palace Guard.
The Endras’tai were more formal than the Adras’tai, and only served in the main city/palace, or with members of the family of the En’rai/Er’rai, in the times were there was an En’rai or Er’rai.
I don’t remember if the Listari “First Family” had Royal Guards, because I didn’t move in those circles.