vaadin-button icon hover color

Flow
1

Hi everyone!

In Vaadin Flow (14.4) how can I achive to color the button’s icon (a tab’s closing X ‘button’) to red when the mouse is over on that?
I saw in lumo\vaadin-button-styles.js the following:

      @media (hover: hover) {
        :host([theme*="tertiary"]
:not([active]
):hover) {
          opacity: 0.8;
        }
      }

Is that the rule which runs when I hover over the icon? Thanks!