@import '~@angular/material/theming'; // @import 'theme-reset'; .app{ &.green{ @import "skins/green"; @include angular-material-theme($green-theme); } &.blue{ @import "skins/blue"; @include angular-material-theme($blue-theme); } &.red{ @import "skins/red"; @include angular-material-theme($red-theme); } &.pink{ @import "skins/pink"; @include angular-material-theme($pink-theme); } &.purple{ @import "skins/purple"; @include angular-material-theme($purple-theme); } &.grey{ @import "skins/grey"; @include angular-material-theme($grey-theme); } }