Hologram

"Help me, Obi-Wan Kenobi; you're my only hope." [static] "Help me, Obi-Wan Kenobi; you're my only hope."

- Leia Organa in her message to Obi-Wan Kenobi

A hologram was a three-dimensional visual projection of a person or object, generally used for communication or entertainment purposes.

Holograms were usually monochrome, often blue, with no or faint other colors. However, full-color holograms were not unheard of, and more advanced holograms, such as those created by the holographic disguise matrix, were realistic enough to fool both observers and electronic sensors.

Hologram projectors came in a variety of shapes and sizes, from handheld devices to massive constructs whose images towered over observers.

Members of the Jedi High Council dispatched to missions on remote worlds could regularly participate in Council meetings held at the Jedi Temple by appearing as holograms.

Holographic technology was sophisticated enough that a holographic image could be made to project a smaller holographic image, as in the case of a holographic image of R2-D2 projecting a message of Princess Leia.

After the Battle of Endor, Supreme Leader Snoke of the First Order utilized holographic technology in which the user could be seen in full color without any scan lines. He utilized this type of hologram when speaking with Kylo Ren and General Armitage Hux, while the two were in a special chamber on Starkiller Base.

Non-canon appearances

 * Star Wars Epic Yarns: A New Hope