This rare starship borrows the distinctive crimson color of the Emperor's Royal Guard. The Imperials have also taken a cue from their Rebel equals by incorporating color in the design of their Royal Guard Interceptor, using a deep red paint to impart a menacing and fearsome feeling to all challengers. Naturally only the highest ranking pilots have access to these state of the art engines and panel designs.
The Empire, at the behest of Lord Vader, has spent countless man hours tweaking the designs of their TIE engines.