[Theme: Twenty Thirteen] Change .format-gallery background-color?

Hello all,

I’m trying to change the post format background of .format-gallery to black, or any color really, and the update isn’t going through.

I’ve isolated the correct code snippet, changed it accordingly, updated accordingly and nothing seems to be happening. This is the last one out of the 9 (I think) different post formats I need to update. I’d like to change it to back, for a lightbox effect on both Images (already done) and Gallery (GRR!).

/* Gallery */
.format-gallery {
	background-color: #000000;
}
.format-gallery .entry-header {
	margin-bottom: 15px;
}

.format-gallery .entry-title {
	font-size: 50px;
	font-weight: 400;
	margin: 0;
}

.format-gallery .entry-meta a,
.format-gallery .entry-content a {
	color: #1F2020;
}

Am I missing something?