It seems during the Turbostar range, many cab interiors were primarily grey.
But now they seem to be blue (thinking 350, 450, Class 70).
Although the Class 68 has gone back to a black and grey colour scheme.
The only thing I can think of is back when Bombardier was throwing out nearly all the trains, their colour scheme was grey.
Now Siemens are on the scene in quite a major way, it appears there's a lot more blue around as that's their standard colour.
But now they seem to be blue (thinking 350, 450, Class 70).
Although the Class 68 has gone back to a black and grey colour scheme.
The only thing I can think of is back when Bombardier was throwing out nearly all the trains, their colour scheme was grey.
Now Siemens are on the scene in quite a major way, it appears there's a lot more blue around as that's their standard colour.