Pastel Colors in Phone/Dialer
Went to Settings->Apps &amp; notifications->Phone->Settings->Uninstall updates (three dots) and ended up with 20.1.197612390. Colors are back to normal. Will see how long they stay this way and if they change the next time the Phone app is updated.  

Update 1

The phone app was updated and the pastel colors returned. Downgraded again to get rid of them. It looks like this intentional on the part of Google.