change color to progrss barr material code example
Example: mat-progress-bar style without app-theme
// Move custom styles to styles.css
.mat-progress-bar .mat-progress-bar-buffer {
background-color: #e6f3ff;
}
// Move custom styles to styles.css
.mat-progress-bar .mat-progress-bar-buffer {
background-color: #e6f3ff;
}