Hello Cliff Ryan,

A warm welcome to these forums.
No response yet; but members have restored Rover 'blue' machines here.

I guess there is some flexibility as to colour because, like many brands,
the colour was never consistent over the years. I prefer a deeper hammertone
blue than the lighter blue of some later machines.

Anyway, hopefully a member will be able to quote a of-the-shelf colour.

Related thread:-
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=60410

Hope this helps.
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JACK