How to add blog header color?

Site URL: https://ColumbiaUrbanAg.org

Our website's header has an all-white logo, which works for all pages except blog posts, the logo just disappears into a white background on the blog. I would like to add a solid color background to our header on all blog pages.

See example of blog post: https://www.columbiaurbanag.org/the-beet/2021/4/6/strategies-to-make-your-charitable-giving-go-further

and of a regular page: https://www.columbiaurbanag.org/opportunity-gardens

8 hours ago, BillyPolansky said:

Site URL: https://ColumbiaUrbanAg.org

Our website's header has an all-white logo, which works for all pages except blog posts, the logo just disappears into a white background on the blog. I would like to add a solid color background to our header on all blog pages.

See example of blog post: https://www.columbiaurbanag.org/the-beet/2021/4/6/strategies-to-make-your-charitable-giving-go-further

 

and of a regular page: https://www.columbiaurbanag.org/opportunity-gardens

try this

[class*=collection-type-blog].view-item .header .header-announcement-bar-wrapper {
  background: #8f993c;
}

That worked, thank you!