Some days ago, NoScript has been updated to v10.1.9.9 version. Additionaly, Firefox v63.0, is out today with very amazing features - for example: Enhanced Tracking Protection (ETP). (It's designed to improve privacy and protect Users. across the Web, from being tracked etc.) But that's not the point.
However, there is one change for 'WebExtensions': they run in their own process on Linux. So, maybe there are more changes, which could change count badge color?
After mentioned update and Firefox restart, I've noticed that NoScript count badge color for blocked items changed. Now it's a black number on a red background (see image below). As We know, it was a white number on a red background. I have no idea what could have had an impact on this. NoScript last Development commits shows nothing about badge color [1].

What is the reason for such a sudden change? Thanks, best regards.
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[1] https://noscript.net/getit#devel