Hello. On my site, I have my header navigation background set to transparent on all of my pages, I have a blue background behind my headers so the navigation logo and nav items just overlay the blue background. For example, see here https://www.graphitefinancial.com/blog or https://www.graphitefinancial.com/
However, for my blog posts I cannot add a blue background behind the header with the theme I'm using. See here: https://www.graphitefinancial.com/blog/title-growth-at-all-cost-strategies-arent-working-for-startups-heres-what-is-and-always-has.
So my logo doesn't show since it is white.
Is there a way for me to set just the blog posts to have a specific background. I DO NOT WANT TO CHANGE THE HEADER NAV BACKGROUND COLOR ON ANY OTHER PAGE BUT A BLOG POST.