<com.jrummyapps.android.colorpicker.ColorPanelView
    android:id="@id/cpv_preference_preview_color_panel"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="@dimen/cpv_color_preference_normal"
    android:layout_height="@dimen/cpv_color_preference_normal"
    app:cpv_colorShape="circle"/>