Special Header Line Color Not Consistent

I am confused about something that isn’t consistent throughout the site. I thought I figured out what was controlling the special heading border color, i.e. the line after the H2 heading in the blue bar on all of my pages. I could have sworn that whatever was controlling the special heading border color was also controlling something else that I needed to be grey so I could read it. I ideally want the line in the heading to be white so it stands out on the blue. For some reason it’s white on the About Oren page but on the rest of the pages (estate planning & probate, business planning & governmental affairs) it is dark gray. Is there a way to get all of those lines on each page to all be white? I have looked in the code but I am probably not looking in the correct place to find the color aspect.