mdb-ui-kit/less/_welljumbo.less

body, .container, .container-fluid {

  .well, .well:not([class^="well well-material-"]) {
    &, .form-control {
      color: @lightbg-text;
    }
    .floating-label {
      color: #7e7e7e;
    }
    .form-control {
      &::-webkit-input-placeholder {
        color: #7e7e7e;
      }
      &::-moz-placeholder {
        color: #7e7e7e;
        opacity: 1;
      }
      &:-ms-input-placeholder {
        color: #7e7e7e;
      }
    }
    .option, .create {
      color: @lightbg-text;
    }
  }
  .well.well-sm {
    padding: 10px;
  }
  .well.well-lg {
    padding: 26px;
  }

  [class^="well well-material-"] {
    &, .form-control, .floating-label {
      color: @darkbg-text;
    }
    .form-control {
      border-bottom-color: @darkbg-text;
      &::-webkit-input-placeholder {
        color: @darkbg-text;
      }
      &::-moz-placeholder {
        color: @darkbg-text;
        opacity: 1;
      }
      &:-ms-input-placeholder {
        color: @darkbg-text;
      }
    }
    // Rule to fix selectize plugin
    .option, .create {
      color: @lightbg-text;
    }
  }

  .well, .jumbotron {

    background-color: #fff;
    padding: 19px;
    margin-bottom: 20px;
    .shadow-z-2();
    border-radius: 2px;
    border: 0;
    p {
      font-weight: 300;
    }

    .variations(~"", background-color, #FFF);
  }
}