godot/editor/icons/OverbrightIndicator.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path fill="#fff" stroke="#000" d="m.5.5v10l10-10z"/><path fill="#000003" d="m0 12 12-12h-1.714286l-10.285714 10.285714z"/></svg>