Color is not claimed as a feature of the mark.
The mark consists of a flag having a fringe border, with the words FIAT JUSTITIA, RUAT CAELUM. in upper case letters on the top portion of the flag, with a 5 point star in the middle and Alamo City Guard's on the bottom portion of the flag.
The English translation of FIAT JUSTITIA, RUAT CAELUM in the mark is Let justice be done though the heavens should fall.