bug(material): the background mismatch the selected theme

[its-dibo]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

mat-horizontal-stepper background is hardcoded set to a white color, which prevents dynamically changing the background color in the dark theme
the same for other components such as Cards

here is a screenshot of a field input inside a horizontal stepper form in the Dark theme
the font color and the label's color are white, while the background color of the field is black
the background color for the stepper should also be black

there is a white label in the dark theme, and the background should be switched to black

the only workaround here is to listen to the changing theme event and manually override the background color for the dark theme for every single component used in the app

Reproduction

StackBlitz link:
Steps to reproduce:
1.
2.

Expected Behavior

the background colo should match the selected theme

Actual Behavior

the background color is fixed

Environment

• Angular: 19
• CDK/Material: 19
• Browser(s): chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Ubuntu