Changing the background color of LEFT margin (in editor)!

Already filed: http://www.jetbrains.net/jira/browse/IDEADEV-56
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Maxim Shafirov
http://www.jetbrains.com
"Develop with pleasure!"

Hi Guys,

Using build #3212 here, seems that I can't find the way to change the
background color of the left margin of the editor where the line
numbers are printed!

Anyone any clue?

Regards,
Armond