I was wondering if it possible to have a Transparent Header on Single Blog Posts
When you edit your post look on the right hand side under Layout settings and you’ll see an option for “Header visibility and transparency” which you can set that to “Transparent Header”.
I set that for my blog page but it just takes effect on that blog page and not the individual single blog articles
You will need to edit them and do the same. We currently do not have an option to make the header transparent by default. You can make a feature request here though, https://kriesi.at/support/enfold-feature-requests/.