Angular - Material: Progressbar custom color?

Question

I am now trying for hours. I use Material2 and simply want to change the color of the progress-bar. I know there are those themes (primary/accent/warn) but I want to have a

Answer 1

Update:

Avoid using deep, TL;DR: Deep is technically invalid (like, deeprecated :p)

For more info refer: The use of /deep/ and >>> in Angular 2

Now, to change the color of mat-progress bar, Here is how I got it working,

Head over to your styles.scss file (or the main css/scss file in your project)

Add this class -->

.green-progress .mat-progress-bar-fill::after {
    background-color: green !important;
}

Your mat-progress should use the above class, like -->