bug(mat-table): SCSS token background-color does not support transparent colors

[jakobgruber]

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

When using the style token background-color to set the background color of the mat-table a transparent color is not supported.

Reproduction

StackBlitz link: https://stackblitz.com/edit/pe9hchk7?file=src%2Fexample%2Ftable-basic-example.scss
Steps to reproduce: Stackblitz example provides two mat-tables, both are similar except the second table has a css-fix so the transparent color is shown.

Expected Behavior

When using the style token background-color to set the background color of the mat-table a transparent color should be supported.

Actual Behavior

When using the style token background-color to set the background color of the mat-table a transparent color is not supported.

Environment

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

[crisbeto]

I think it's a problem with your syntax. Sass converts the rgb(0 0 0 / 0.5) to rgba(0, 0, 0, 0.5). You can work around it by setting it through rgba instead.