My-distro-configs-devuan/themes/Fluent-round-Dark-compact/gtk-4.0/assets/scalable/circle-bg-hover.svg

<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32"><circle cx="16" cy="16" r="16" style="opacity:.2;fill:#fff;stroke-width:2;paint-order:normal"/></svg>