Background Overlay Color

maybe some filters like grayscale and blur, will be nice too.

This for the Page Header add-on? Interesting idea - it would only work in modern browsers but that's not so bad :)

Overlay works in old browsers (ie9+), but filters only in modern browsers.

https://jsbin.com/nuqere/edit?html,css,output
http://caniuse.com/#feat=css3-colors
http://caniuse.com/#search=filter

I was thinking as a feature of Sections too.

@edit

overlay can works in ie8 using opacity instead rgba.
https://jsbin.com/qasazuy/edit?html,css,output

sorry, opacity is a bad idea.

Yea, opacity includes all the content within the section.

Thanks for the ideas though, I'll see what I can do :)