Why doesn't the painting of the icon work on hover?

Question

OctoberCMS

CSS prescribed that when hovering, the color changed through Fill. I loaded it in October and now it does not work (How to be .........

Answer 1

Perhaps it was worth giving an example of CSS and SVG code in your question.
It works like this:

.icon:hover {
    fill: red;
}

<svg class="icon">
    ...
</svg>

And most likely, if everything is done correctly, but it doesn’t work inside your site, it means that either the styles are reassigned somewhere, or they are not connected at all