Organizr/bower_components/mdi/scss/_extras.scss

.#{$mdi-css-prefix + '-18px'} { font-size: 18px; }
.#{$mdi-css-prefix + '-24px'} { font-size: 24px; }
.#{$mdi-css-prefix + '-36px'} { font-size: 36px; }
.#{$mdi-css-prefix + '-48px'} { font-size: 48px; }
.#{$mdi-css-prefix}-dark { color: rgba(0, 0, 0, 0.54); }
.#{$mdi-css-prefix}-dark.mdi-inactive { color: rgba(0, 0, 0, 0.26); }
.#{$mdi-css-prefix}-light { color: rgba(255, 255, 255, 1); }
.#{$mdi-css-prefix}-light.mdi-inactive { color: rgba(255, 255, 255, 0.3); }