Sidebar Width

Hi I am trying to get both sidebars in the 3 column layout to have identical width with the Hueman theme. Basically I want the Primary sidebar to have the same width as the secondary sidebar and have all content centered.

I have played around with the css and I still can’t manage to do it when I modify the sidebar S1 i believe I am left with a padding or area to the right thats the same color of the sidebar background.