KOTOR 1
Bastila~ Her own.
Juhani~ Blue Double.
Revan~ Blue Double.
Jolee~ His own.
KOTOR 2
The Exile~ Silver Double, if possible 2 Silver singles* on Malachore, but I prefer a Double, they look better, and what Kriea said about men and their sabers.
Bao-Dur~ Silver Double, or Blue Double if Silver isn't possible.
Brianna~ Same as Bao-Dur.
Mira~ 2 singles* both Bronze, if no bronze they would be Orange.
Visas~ Her own, or the same as Mira.
Atton~ Double or single Bronze, or Orange.
Kriea~ If I could get enough Sabers I would give her a Single* Silver, but I usually give her a sword that gives some special feat.
All colours are the same for any alignment.
*= Normal length.