What does it mean when a CSS rule is grayed out in Chrome's element inspector?

Question

I\'m inspecting an h2 element on a web page using Google Chrome\'s element inspector and some of the CSS rules--which appear to be applied--are grayed out. It

Answer 1

When using webpack, any css rule or property that has been changed in the source code is grayed out when the page reloads after a rebuild. This is really annoying and forced me to reload the page every time.