zetor 3011 colour ????

hello again , we have recently purchased a 67' zetor 3011 and it seems to be the usual orange and gold ( under all the grime ) , however when researching them on line most of the 3011's seem to be painted blue with even the odd green one floating about , is there a reason for this ??

we would like to restore our tractor to its former glory but we want to get the color correct for its age etc .

red and gold is the export colour, blue or green were colours for specific state farms in czechia. Older models were also yellow or khaki.