Android : Navigation bar transparent and the buttons into dots

How can you I the navigation bar transparent and the buttons into dots? Like in Sony’s camera app on Android 4.4? If I set

<item name="android:windowTranslucentNavigation">true</item>

and SystemUiVisibility as View.SYSTEM_UI_FLAG_LOW_PROFILE, it keeps navigation bar translucent but home button, back button etc. keep their icon and if I remove <item name="android:windowTranslucentNavigation">true</item>, icons replace with dots as should. Any ideas? Thanks.