Line between color sections

Hi there helpful people :)
I need some help. I can’t figure out how to get rid of the tiny line separating the color sections on my site?
As it is right now I have put two similar colored sections on top of the site to show you what I mean. Between the two “blueish” sections there is a small white line. The sections do not float(?) together. Can you help me? Can I add something in the quick CSS?
You an see the site here: http://vildbird.se.preview.binero.se/ny/
Thankful for help.

Kris.