As I promised, here are the breakdowns in colour per manufacturer if anyone wants to crosscheck their collection with mine.
To obtain the numbers, go to Records, then Garage and select display By Manufacturer.
For number of unique models see the numbers under each manufacturer logo (e.g. Acura 9/9).
For total colours enter that manufacturer and see the number shown on top right (e.g. on mine Acura shows 38).
Manufacturer (Unique Models, Total Colours)
AC Cars (1,16)
Acura (9,38)
Alfa Romeo (11,86)
Alpine (2,2)
Amuse (4,30)
ASL (2,5)
Audi (20,128)
Bentley (1,1)
Blitz (1,1)
BMW (15,80)
Bugatti (2,14) or (1,13) if you don't have black Veyron SP Model
Buick (2,2)
Cadillac (1,1)
Callaway (1,5)
Chaparral (2,2)
Chevrolet (19,137) or (18,136) if you don't have white ZR1 SP Model
Chrysler (3,21)
Citroen (8,72) or (7,71) if you don't have yellow GTbC SP Model
Cizeta (1,4)
Daihatsu (15,81)
DMC (1,1)
Dodge (9,83)
Dome (1,1)
Eagle (1,7)
Ferrari (3,10) or (2,9) if you don't have yellow Enzo SP Model
Fiat (7,40)
Ford (18,58)
FPV (2,26)
Gillet (1,1)
Ginetta (1,4)
HKS (1,1)
Hommell (1,6)
Honda (89,512)
HPA Motorsports (1,1)
Hyundai (7,36)
Infiniti (4,20)
Isuzu (3,14)
Jaguar (7,72)
Jensen Healey (1,14)
Lamborghini (3,11) or (2,10) if you don't have orange Countach SP Model
Lancia (5,11)
Land Rover (1,1)
Lexus (10,70)
Lister (1,1)
Lotus (14,117)
Marcos (1,6)
Mazda (84,328)
Mercedes-Benz (19,171) or (18,170) if you don't have red SLR SP Model
Mercury (1,16)
MINE'S (2,2)
Mini (4,38)
Mitsubishi (67,286)
Mugen (1,7)
Nismo (7,12)
Nissan (118,528) or (117,527) if you don't have blue GT-R SP Model
Opel (7,50)
Opera Performance (2,2)
Pagani (4,4)
Panoz (1,1)
Pescarolo (3,6)
Peugeot (12,71)
Plymouth (2,55)
Polyphony Digital (1,10)
Pontiac (5,32)
Protomotors (1,7)
RE Amemiya (1,1)
Renault (5,34)
Renaultsport (8,38)
RUF (5,49)
Saleen (1,3)
Scion (2,14)
Seat (1,15)
Shelby (3,6)
Spoon (5,7)
Spyker (1,2)
Subaru (30,110)
Suzuki (11,51)
Tommy Kaira (2,8)
TOM'S (1,4)
Toyota (72,340)
TRD (1,5)
Trial (1,1)
Triumph (1,10)
TVR (7,97)
Vauxhall (7,55)
Volkswagen (16,96)
Volvo (2,27)
Judging by the state of this particular forum, my effort will probably go to waste. Anyway, hopefully someone will find this list helpful when completing their car collection 👍
P.S. When replying to this post, try not to quote the whole thing and help Jordan save some precious server space lol.