surfaceContainerLow must be declared, otherwise Cards and navbars appear with transparent backgrounds

[vicenteparmi]

Describe the bug In Flutter 3.22, parameters like surfaceContainerLow must be declared inside the ColorScheme, otherwise Cards and navbars appear with transparent backgrounds. I declared it myself inside the toColorScheme function and it is fixed now.

To Reproduce Steps to reproduce the behavior:

1. Update to Flutter 3.22
2. Use the generated Dart file from the theme builder
3. Use a card widget or navbar
4. The backgrounds will be transparent

Expected behavior The theme should provide the colors and the default backgrounds would appear.

Screenshots

• Imgur

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome
• Version 124.0.6367.208

Smartphone:

• Device: GalaxyA71
• OS: Android 13

[talamaska]

The Material 3 theme builder seems unfinished. I generated a theme for Flutter and despite having defined surfaceContainer elevation tints in MaterialTheme and ColorScheme, they are lost during the conversion to ColorScheme. We have a lot of missing colors. basically all surfaceContainer levels plus fixed colors for primary, secondary and tertiary colors.