BNSF uses 3 different basic paint schemes. Heritage-III is the latest with the new corporate "swoosh" logo. New locomotives (7515) are delivered in this scheme and older units (2012) repainted in a variation of H-III.  Heritage-II (4344) preceded H-III. Older locomotives were usually repainted in the Heritage-I scheme (6751), though I've seen many former ATSF high horsepower units repainted in H-II. The 1st 164 GE C44-9's were H-I, but had silver fuel tanks and trucks (1027).

BNSF 6751 at Socorro, NM, 4/19/06.

BNSF 2012 at Lacrosse, WI,  10/20/06.

BNSF 1027 at Essex, MT, 8/30/01.

  BNSF 7581 at Abo Canyon, NM, 5/05/11.  The  tracks on the left are the last few hundred yards towards completion of  double tracking Abo Canyon, the last bottleneck on  the BNSF "transcon".

BNSF 4344 at Skykomish, WA, 7/23/02.

BNSF 7773 at Kingman, AZ, 5/10/07.