The Khalai are the main faction of the protoss, with blue plasma beams and a gold/blue decoration.
Mothership
The mothership is a capital that houses fighters and hundreds of protoss warriors in stasis, it is very costly to make and has very powerful weapon systems.
Carrier
The carrier is a capital that can power nearby robotics and launches 6 - 8 interceptors at enemies along with firing powerful weapons.
Interceptor
Fired by carriers, small vessels that have minimal weapon capibilty and hull, used for swarming and confusing enemies. (Robotic)
Tempest
A frigate that does high damage and is commonly seen attacking heavily armored ships.
Warp Ray
A design stolen from the nerazim, has a different design and weaponry.
Scout
Is quite simply, a scout/fighter, has minimal weapons and moves quickly.
Phoenix
Fighter that moves very fast and has okay weaponry, better in numbers.
Robotic Phoenix
Phoenix that requires a carrier nearby to function, is more effective but is worse at long range, and better at short range. (Robotic)
Warp Prism
Has VERY minimal weapons and moves at a medium speed, is a transport ship that carries 5 - 7 warriors.
Observer
Needs to be near a carrier to function, is cloaked and has no weaponry and very minimal defense. (robotic)