Again at ${DAYWORK} I was working on a network diagram, and found this incredibly useful website that regroups thousands of svg icons for all the major brands. I use draw.io to create my diagrams, and whereas they have a tutorial on how to modify an svg color (fill property) within draw.io, it would not work as shown.
I figured out there was a very simple method to specify an svg file default color: edit the file, and add fill="white" (or any color code like #fafafa).