How to make a block full width?

Question

Content

Hello!
I decided to make a template .. and I can't make the block width full screen.
That is:
Header - full screen width
Content in the middle (width: 1235px; margin: 0 auto;);
And here in the content there are sections with different background colors that need to be expanded to the maximum width of the screen, but the information in it is only 1235px and centered.
And the problem is that the color is only on 1235px of these .. when I increase it in the browser, it is clearly noticeable

Answer 1

I think I understand what the problem is ..
With adaptation :)
When you increase - the width and height changes to -
And when you decrease - to +
You can close the topic.