html
css
.logo-img path {
Since SVG is basically code, you need just contents. I used PHP to obtain content, but you can use whatever you want.
Then, I've printed content "as is" inside a div container
To finnaly set rule to container's SVG childs on CSS
.fill-class > svg {
fill: orange;
}
I got this results with a material icon SVG:
Mozilla Firefox 59.0.2 (64-bit) Linux
Google Chrome66.0.3359.181 (Build oficial) (64 bits) Linux
Opera 53.0.2907.37 Linux