With Base Web, you can use your custom icon set. To do that, you have to provide your icons in the theme.
You can use any React components as Icon replacements, as long as they accept the following properties:
size, to set their width and height,
color, to set their colors,
title, to set the title of the icon for accessibility purposes.
The example below overrides the
ChevronLeft icon with the
ArrowLeft icon, making the pagination slightly different.
All the icons that can be found on the Icon component page can be overridden using this technique.
To learn more about creating and using themes, check out the the Custom themes documentation page.