tachiyomi/app/src/main/res/drawable/ic_brightness_4_24dp.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">
  <path
      android:fillColor="#FF000000"
      android:pathData="M20,8.69V4h-4.69L12,0.69 8.69,4H4v4.69L0.69,12 4,15.31V20h4.69L12,23.31 15.31,20H20v-4.69L23.31,12 20,8.69zM12,18c-0.89,0 -1.74,-0.2 -2.5,-0.55C11.56,16.5 13,14.42 13,12s-1.44,-4.5 -3.5,-5.45C10.26,6.2 11.11,6 12,6c3.31,0 6,2.69 6,6s-2.69,6 -6,6z"/>
</vector>