navigation background color and bottom tab ripple

According to google's official apps that uses material you, there is some differences between the react native paper and the official material you design

1- in the bottom tabs, the ripple effect in the official design is only affect the bottom tab icon, not the whole button

2-when you adapt the react navigation theme, the background color is different from google's official apps background color,
I think the problem is that the `background` color property in the navigation theme should be the same value as the `card` property.

I say this because in the example app, the drawer background color have the same color of the google's main apps background color.

Thanks in advance