How do I Make Firefox Print a Background-Color Style?

Question

I have some simple CSS:

#someElement {
    background-color:black;
    color:white;
}

It looks ok in the browser, but when I go to print it

Answer 1

This is how I made it to work in my case by adding the below two lines to the particular div. "@@supports (-moz-appearance:meterbar)" is helpful to add styles specific to Firefox.

-webkit-print-color-adjust: exact; color-adjust: exact;

@@supports (-moz-appearance:meterbar) {
    .container {
        margin: 0;
        font-size: 0.85em;
        width: 100%;
        -webkit-print-color-adjust: exact;
        color-adjust: exact;
    }
}