mdb-ui-kit/sass/_mixins.scss

// usage: @include variations(unquote(" .check"), color, transparent);
@mixin variations($extra, $property, $default){
  @include generic-variations($extra, $default) {
    #{$property}: $material-color;
  };
}

@mixin background-variations($extra, $default){
  @include generic-variations($extra, $default) {
    background-color: $material-color;
    & when ($material-color = $btn-default) {
      color: $lightbg-text;
    }
    & when not ($material-color = $btn-default) {
      color: $material-text-color;
    }
  };
}

@mixin text-variations($extra, $default){
  @include generic-variations($extra, $default) {
    color: $material-color;
  };
}

//
// To use this mixin you should pass a function as final parameter to define
// the style. In that definition you can use the following variables to define it.
//
// $material-color-name ---> "red", "green", "indigo" ...
// $material-color-full-name ---> "red", "green-50", "indigo-400" ...
// $material-color ---> #f44336, #e8f5e9, #5c6bc0 ...
// $material-text-color ---> rgba(255,255,255,0.84), rgba(0,0,0,0.84), rgba(255,255,255,0.84) ...
//


@mixin generic-variations($extra, $default){

  $contrast-factor: 40% !default;

  // bootstrap styles
  &#{$extra}, &-default#{$extra} {
    $material-color-name: "default" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $default !default;
    $material-text-color: $darkbg-text !default;
    @content
  }
  &-black#{$extra} {
    $material-color-name: "black" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $black !default;
    $material-text-color: $darkbg-text !default;
    @content
  }
  &-white#{$extra} {
    $material-color-name: "white" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $white !default;
    $material-text-color: $lightbg-text !default;
    @content
  }
  &-inverse#{$extra} {
    $material-color-name: "inverse" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $inverse !default;
    $material-text-color: contrast($inverse, $lightbg-text, $darkbg-text, $contrast-factor) !default;
    @content
  }
  &-primary#{$extra} {
    $material-color-name: "primary" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $primary !default;
    $material-text-color: $darkbg-text !default;
    @content
  }
  &-success#{$extra} {
    $material-color-name: "success" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $success !default;
    $material-text-color: $darkbg-text !default;
    @content
  }
  &-info#{$extra} {
    $material-color-name: "info" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $info !default;
    $material-text-color: $darkbg-text !default;
    @content
  }
  &-warning#{$extra} {
    $material-color-name: "warning" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $warning !default;
    $material-text-color: $darkbg-text !default;
    @content
  }
  &-danger#{$extra} {
    $material-color-name: "danger" !default;
    $material-color-full-name: $material-color-name !default;
    $material-color: $danger !default;
    $material-text-color: $darkbg-text !default;
    @content
  }

  // given a color build multiples depths
  $material-color-names: "red" "pink" "purple" "deep-purple" "indigo" "blue" "light-blue" "cyan" "teal" "green" "light-green" "lime" "yellow" "amber" "orange" "deep-orange" "brown" "grey" "blue-grey";
  @each $material-color-name in $material-color-names

    //$material-color-numbers: ""; // single element empty string
    //@each $material-color-number in $material-color-numbers
    //&-material-#{$material-color-name}#{unquote($material-color-number)}#{$extra} {
    &-material-#{$material-color-name}#{$extra} {
      $material-color-full-name: "#{$material-color-name}#{$material-color-number}" !default;
      $material-color: $material-color-full-name !default;
      $material-text-color: contrast($material-color, $lightbg-text, $darkbg-text, $contrast-factor) !default;
      @content
    }
}


$all-variations: unquote("-default, -primary, -info, -success, -warning, -danger") !default;