Jedi garments are worn by Jedi. They come in a wide variety of colors, mostly the traditional neutrals which make up the simple palette of the Jedi.
Jedi Knight garments tend to be thickly armored. Knights use the Force to remain graceful and quick even when wearing such heavy armor. These clothes suit them because due to their usage of lightsabers extensively, always at the frontline alongside their troops in battle.
The garments of the Jedi Consular are not as thickly armored than those of the Jedi Knight. Since Consulars are diplomats rather than soldiers and more force-oriented than their Knight counterparts, they opt for light robes which also serve a ceremonial purpose so that they can move quickly and gracefully in any combat situations which might arise.