google-material-design-icons/android/action/opacity/materialiconsoutlined/black/res/drawable/outline_opacity_24.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M17.66,8L12,2.35 6.34,8C4.78,9.56 4,11.64 4,13.64s0.78,4.11 2.34,5.67 3.61,2.35 5.66,2.35 4.1,-0.79 5.66,-2.35S20,15.64 20,13.64 19.22,9.56 17.66,8zM6,14c0.01,-2 0.62,-3.27 1.76,-4.4L12,5.27l4.24,4.38C17.38,10.77 17.99,12 18,14H6z"/>
</vector>