Hi Brendan, it looks like it's not in moi.css but is instead defined locally in the file SidePaneContextArea.htm . Look for the rule like this:

		#PropObjectSize {
			color:#555;
			font-size:90%;
			word-wrap:break-word;
			overflow-x:hidden;
		}

Change the color: property there, or remove it if you want it to have the regular text color.

- Michael