colour scheme per buffer?

Is there any way to colour a buffer differently from another? how hard
would it be to implement this? I often have 2-4 buffers split and
displayed, I want to set the focused buffer to my regular colour
scheme, and all other buffers to a dull washed out low contrast colour
scheme.

cheers,

tjs

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Timothy J Stebbing, Senior Developer, Nunatak Systems
301 sandy bay rd, sandy bay, TAS, AU 7050