Changing border color in mat-form-field

I am using angular material mat-form-field. I have a dark background, and therefore am trying to change the border of the form-field to white. But I am not able to achieve it using css. No, matter what changes I do in the css, they are not reflecting back into the mat-form-field. Here is the link to my code:

StackBlitz link to my work

Any help would be highly appreciated. Thanks.

Continue reading...