All the Tractors of the Rainbow

A teacher told me that one could remember the colors of the rainbow by the name ROY G BIV (red, orange, yellow. green, blue, indigo, and violet). Tractors come in all rainbow colors.

Red - Case, Mahindra, Versatile, Cockshutt, Branson, McCormick, Zetor, Belarus + many others

Orange - Kubota. Kioti, Allis Chambers, Fiat, Daedong + others

Yellow - Caterpillar, JCB Fastrac

Green - John Deere, Claas (lime green), Fendt, Deutz, Oliver

Blue - Ford, New Holland

Indigo and Violet - A purple tractor is made by Long Landtrac. Oliver made one purple tractor to promote their plow.

There are black and white tractors too. Can you research and find out their names?