Changing header color not changing header color

Hello,

It worked at the first few days but for some reason out of the blue it went back to the default pinkish color and although I set a new header color from the whoop cp and save changes, the color does not change.

Website is: http://www.oigente.com

And the color I would like for the header: 0f9d49

What can be happening and how to fix?

Thank you