Hello, @Jarciano Silva,
Thanks for the screenshot I have understood your issue.
Now, In order to solve your issue simply go to the Dashboard >> XStore >> Theme Settings >> Theme Custom CSS >> Global and paste the below code at the bottom of the CSS box there.
.ibox-block .ibox-symbol i{color:black !important;}
Then save settings and check back to your site after clearing the browser cache. The result will appear like this: https://postimg.cc/cvrv8knK
Regards 8Themes Team.