backdrop-filter is a recent CSS feature, that is not yet available in modern browsers (at least as of July 1, 2016).
bac
You could try to add different filters to the background images:
https://css-tricks.com/almanac/properties/f/filter/
The downfall to this, is that it only works on images.
Basically, there are 10 built-in filters for the CSS filter property:
And additionally, you can provide it an url, wich contains an XML file with the appropariate filter.