Styling headers on all individual event and blog posts

Site URL: https://nwi-new.squarespace.com/

I'd like to target all individual event and blog posts across the website to set those pages' headers (the actual logo and nav menu header) to have a specific background color, using CSS. Site pw is community. Any help is much appreciated!!

Hi,

Password is incorrect

However if you use SS 7.1, you can use this

body[class*="type-blog"], body[class*="type-event"], body[class*="type-events"] {
	header#header {
		background-color: red !important;
}
}