It’s not just that the image is transparent though, because the color of the text changes too. I thought perhaps it’s using the site CSS to style SVG elements (

It’s not just that the image is transparent though, because the color of the text changes too. I thought perhaps it’s using the site CSS to style SVG elements (which appears to be possible, though I haven’t tried it), but it turns out it’s just a CSS filter `invert(83%) hue-rotate(180deg)`. Still, it looks great and I’m impressed by the attention to detail.