Flutter Android Studio Color Palette not showing

Question

Recently I started learning flutter, I am trying to change the color. The Tutor on her screen when typing Colors. The IDE automatically shows color palettes whereas in my case it doesn't. I tried the following options:

Settings -> Editor -> General -> [checkbox]Show quick documentation on mouse move

Settings -> Editor -> General -> Code Completion -> [checkbox]Insert selected suggestion by pressing space, dot or other content-dependent keys & [checkbox]Show the documentation popup in .... ms
It doesn't work on any of those. I've attached the screenshot.
Tutor Screenshot: My Screenshot:

Answer 1

Color palette is part of Quick Documentation.

So, put the mouse cursor over the Colors class or the color name as bellow:

And then, go to View -> Quick Documentation, or use the shorthand key

• Windows - CTRL+Q
• MacOS - F1

When the help panel has been shown, you can scroll down and see all available colors.

Viewing over color name