Background Header Color Not Changing in Fonts and Color

Summary

I've have tried to no avail to change the background color in Fonts and Color

Content

Hi All,

 

I've been trying to change the background header color of the Taleo Learn to just white. I don't even remember how the color changed or if it was their originally. I looked for the css file in Resource Manager and couldn't find it. I tried several times to change the color in Fonts and Colors and it would not budge. I also tried changing the color in the header with css. I am quite at wits end with it at this point. Any ideas what this could be or how I can resolve this? Unfortunately, when I try to create subcenters