How to Change Header Icon Color?

Here ya go, @Juless

These kind of very specific CSS selectors should work, but is rarely used because it is normally not necessary to be this specific:

svg.fa.d-icon.d-icon-bolt.svg-icon.svg-node{
  /* your cool CSS here */
}

However, in practice, this simple selector should work fine:

svg.d-icon-bolt{
   /* your cool CSS here */
}

Hope this helps.

You might even “get by” with this:

.d-icon-bolt{
   /* your cool CSS here */
}