How to change fading color in fancybox?

Question

css

Tell me where to change the darkening color in fancybox in the css file and jquery.fancybox-1.2.1.pack.js it is not there where else can it be?
Here is the photo itself.

Answer 1

$.fancybox({
overlayColor: '#000'
})

Answer 2

This is a crutch, because FancyBox has all this written in the js itself, but since, having found this file, I found that it is encoded (or something else), it's easier to do this:

#fancybox-overlay {background-color: #YOUR_COLOR !important}

Answer 3

I'll add an answer. It is better to register in rgba.
This is the color that is currently