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There are new CSS properties being introduced to do just this thing, they are blend-mode and background-blend-mode. Currently, you won't be able to use them in any sort of production...
Assuming I understand you correctly, you want to modify the background to be transparent without making all the children transparent. E.G. You don't want to do opacity: 0; Instead use...
var c = $('body').css('background-color'); var rgb = c.replace(/^(rgb|rgba)\(/,'').replace(/\)$/,'').replace(/\s/g,'').split(','); for(var i in rgb) { console.log(rgb[i]); } Try it here http://jsbin.com/uhawa4 Edit : var c = $('body').css('background-color'); var rgb = c.replace(/^rgba?\(|\s+|\)$/g,'').split(','); for(var...