.files/.local/share/icons/McMojave-circle-blue/actions/symbolic/paint-swatch-symbolic.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path d="M1 1v14h14V1H1zm1 1h12v12H2V2z" style="fill:#363636;stroke-linecap:round;stroke-linejoin:round;stop-color:#000"/><path d="M3 3h10v10H3z" style="fill:#363636;stroke-linecap:round;stroke-linejoin:round;stop-color:#000"/></svg>