[3] All locomotives numbered from DD51 2 onwards were finished in the standard diesel livery of orange/red with grey upper surfaces separated by a white stripe.

Re-engined locos operated by JR Freight in Hokkaido sport a livery based on the Class DF200 colour scheme, with no white stripe.

JR Hokkaido locos were all finished in the "Hokutosei" livery of blue with a gold stripe and shooting star logo.

Whereas regular members of the class have white handrails and edges to the running boards, they are polished stainless steel on this particular locomotive, as are the exhaust shrouds.

[4] Many of the JR Freight locomotive underwent life extension refurbishment, which included removal of steam generator equipment where still fitted.

These locos are distinguished by a new livery of blue with grey upper surfaces separated by a white stripe, and cream end panels.