README.md

@@ -50,6 +50,18 @@ The [online](https://svgomg.net/) version can be used.
 - Make sure `Prefer viewBox to width/height` is enabled.
 - Download the optimized SVG file.
 
+### Last touch of style
+
+If desired, a `<style>` node can be added to the `<svg>` root with the following
+content:
+
+```css
+:root{color-scheme:light dark;fill:currentColor;}
+```
+
+This will allow the SVG to adapt to light and dark modes, even when used from a
+`<img>` element.
+
 ### Git
 
 - Push to this Git repository. No need to use [Git LFS](https://git-lfs.com/).