https://www.youtube.com/watch?v=0q5qOYp9ihY&t=14m52s
![Image](https://i.imgur.com/alxeEEx.png)
I haven't played Super Mario 3D All-Stars, but I did notice color banding a few days ago while playing another game on the Switch and was a little suprised as, bear in mind that this is while my Switch is set to "Full" RGB Range, for my PS4 I have set it to "Full" RGB Range as well and Deep Color is set to "Automatic" and I never experienced this on PS4.
This is an example of color banding:
![Image](https://i.pinimg.com/originals/10/c9/e8/10c9e8200357ce1b5c10c396596751be.jpg)
See the left side, that's color banding.
I found out that technically the Switch can output "Deep Color" (10-Bit/1.07 Billion Colors) which would (should) remove color banding/color gradient issues, however there is no (unlike with PS4) option that allows you to enable it on the console, but instead the console decide to enable it or not. See this thread:
https://www.neogaf.com/threads/surprisi ... s.1393483/