Layout of two blocks of different widths with different backgrounds to the edges of the screen - how?

Question

Layout

How do you get this sorted out?
12 columns layout - bootstrap. If the blocks from the layout were of equal size, then this could be implemented. But here ... In general, how do you type this gentlemen ???

Answer 1

Is it necessary?
https://codepen.io/web-tech/pen/zVRxeW

Answer 2

Move these blocks outside the bootstrap grid, make two divs with the right percentages, and then continue the grid?