Monitor Light Color:
Colorize the monitors lights or brightness.
Colorize the monitors hull.
Change the monitor model to Halo: Combat Evolved - Halo: Reach, Halo 4 - Halo 5: Guardians, Halo Infinite, or Sentinels (big stretch).
Cracks in the hull or eye or missing parts
Imagine if this came to be real, a black bungie monitor with a Cracked dim red eye, or a gold clean Halo Infinite monitor with a white eye that illuminates the whole area. The possibilities would be amazing.