Use this Grid for creating new layouts. You can combine this percentages with each other for creating uniq layouts.
Almost all layouts have one HTML structure:
Section ↴
Container ↴
Grid ↴
Grid Item
Grid Item can be different widths.
Use this additional spaces if needed.
You can easily choose predefined space just input combo class that you need or create your own.

This is done so that you can easily control the color of the icon, and change it on hover







Hope these steps help you to use this technic to create or control your own icons.
SVG code you can grab almost in any graphic editor.
