src/resources/themes/stylesheets/sencha-touch/tizen/variations/dark/src/form/_FieldSet.scss

   1 .x-form-fieldset {
   2         border-color: $dark-fieldset-border-color;
   3
   4         .x-form-fieldset-title {
   5                 color: $dark-fieldset-title-color;
   6         }
   7
   8         .x-form-fieldset-instructions {
   9                 color: $dark-fieldset-instructions-color;
  10         }
  11 }