Hi @steppin ,
Since the Storefront theme search bar does not have the same layout as the one shared in your example, this would require customization or a plugin to achieve.
On the other hand, you do have the option of changing the color of the magnifying glass icon itself by adding the following CSS to Appearance → Customize → Additional CSS:
.site-search .widget_product_search form::before {
color: blue
}
You can simply change the color “blue” to your preferred color.
Alternatively, you can change the color of the search box itself by adding the following CSS to Appearance → Customize → Additional CSS:
.site-search .widget_product_search input[type=text],.site-search .widget_product_search input[type=search] {
background-color: pink
}
Again, you can change the color from “pink” to your desired color.
Hope this helps!