java/res/drawable/keyboard_key_feedback_background_you.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/keyboard_key_normal_color_you"/>
    <corners android:radius="@dimen/keyboard_key_corner_radius_you" />
    <size
        android:width="40dp"
        android:height="1dp" />
</shape>