Quasar class

The Quasar class was a Federation starship class, a tier 2 science vessel type in service in the 25th century. The Aurora was derived from the 2370s design. Due to their modular nature, components such as saucer, hull, nacelles and nacelle pylons were interchangeable between the Quasar and its sister classes. The ship class was also in use by the Terran Empire in the mirror universe. In 2409, Federation Starfleet gained access to some of these counterparts through the Lobi Crystal Consortium. 

Livery
In the 25th century, the design of the Quasar-class science vessel allowed its commanding officer to choose from different designs of livery, which could be modified further at starbases. The basic options were designated Type 1-5 and Veteran. 

Furthermore, the installation of deflector shields from specific factions modified the hull appearance, including shields from the Reman Resistance, the Breen Confederacy and the Dominion.