I got bored...so I went to autotrader and then looked at 5 different 318ti's (different years) and clicked on "Model info" and then it gave me a range of different colors...
1995-
Dark Green II
Devine Blue Metallic
Avus Blue Pearl Metallic
Dakar Yellow
Sorrento Blue Metallic
Ascot Green Metallic
Orient Blue Metallic Pearl
Morea Green Metallic
Cordoba Red Metallic
Daytona Violet Metallic
Jet Black
Madeira Black
Sienna Orange Metallic
Cashmere Beige Metallic
Boston Green Metallic
Navarro Violet Metallic
Aspen Silver Metallic
Mojave Brown Metallic
Dark Blue
Calypso Red Metallic
Oxford Green Metallic
Diamond Black Metallic
Bright Red
Alpine White III
Montreal Blue Metallic
Fjord Gray Metallic
Samoa Blue Metallic
Arctic Silver Metallic
Cosmos Black Metallic
Alaska Blue Metallic
Alpine White
1996-
Arctic Silver Metallic
Montreal Blue Metallic
Alpine White
Jet Black
Bright Red
Boston Green Metallic
Calypso Red Metallic
Alaska Blue Metallic
1997-
Bright Red
Dark Green II Metallic
Montreal Blue Metallic
Boston Green Metallic
Dakar Yellow
Dark Blue
Calypso Red Metallic
Turquoise Green
Oxford Green Metallic
Palmettogruen Metallic
Arctic Gray Metallic
Black II
Orient Blue Metallic Pearl
Alaska Blue Metallic
Imolarot Uni
Samoa Blue Metallic
Morea Green Metallic
Cosmos Black Metallic
Atlanta Blue Metallic
Madeira Black Pearl Metallic
Alpine White III
Estorial Blue Pearl Metallic
Avus Blue Pearl Metallic
Arctic Silver Metallic
Violet Red II
1998-
Boston Green Metallic
Kiruna Violett Pearl Metallic
Ascot Green Metallic
Morea Green Metallic
Black II
Fern Green Pearl Metallic
Avus Blue Pearl Metallic
Madeira Black Metallic
Aegean Blue
Imola Red
Bright Red
Cosmos Black Metallic
Sierra Red Pearl Metallic
Arctic Silver Metallic
Titan Silver Metallic
Alpine White III
1999-
Cosmos Black Metallic
Titanium Silver Metallic
Avus Blue Metallic
Fern Green Metallic
Alpine White
Bright Red
Jet Black
I hope that information is correct.
-Randy