Dcat-Admin/resources/assets/sass/plugins/forms/validation/form-validation.scss

// Core variables and mixins
@import "../../../bootstrap/functions";
@import "../../../bootstrap/mixins";

// Core variables and mixins overrides
@import "../../../core/variables/variables";
@import "../../../bootstrap/variables";

// Overrides user variable
@import "../../../core/variables/components-variables";

.form-group{
  // when an issue or error occured
  &.issue, &.error{
    .help-block, .help-inline{
      color: $danger;
    }
    input, select, textarea{
      border-color: $danger;
    }
    input:focus, select:focus, textarea:focus{
      border-color: $danger;
      -webkit-box-shadow: 0 3 10px 0 $danger;
         -moz-box-shadow: 0 3 10px 0 $danger;
              box-shadow: 0 3 10px 0 $danger;
    }
  }


  // Validation Message Scss
  .help-block ul{
    padding-left: 0;

    li{
      list-style-type: none;
      font-size: 0.875rem;
      padding-top: 0.2rem;
    }
  }
}