Hi all I want to apply different colors on a simple plot:

If I type par(br="gray") before a plot it puts all the image in gray but
(imagine I run a simple plot) want to let the centrall box (where the dots
are plotted) in white or image in lightblue.

Can anyone guide me to apply this second step (make the box where the series
are plotted in different colours).

Thanks in advance.

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