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.select2-container--default.select2-container--focus,.select2-selection.select2-container--focus,.select2-container--default:focus,.select2-selection:focus,.select2-container--default:active,.select2-selection:active{outline:none}.select2-container--default .select2-selection--single,.select2-selection .select2-selection--single{border:1px solid #d2d6de;border-radius:0;padding:6px 12px;height:34px}.select2-container--default.select2-container--open{border-color:#3c8dbc}.select2-dropdown{border:1px solid #d2d6de;border-radius:0}.select2-container--default .select2-results__option--highlighted[aria-selected]{background-color:#3c8dbc;color:white}.select2-results__option{padding:6px 12px;user-select:none;-webkit-user-select:none}.select2-container .select2-selection--single .select2-selection__rendered{padding-left:0;padding-right:0;height:auto;margin-top:-4px}.select2-container[dir="rtl"] .select2-selection--single .select2-selection__rendered{padding-right:6px;padding-left:20px}.select2-container--default .select2-selection--single .select2-selection__arrow{height:28px;right:3px}.select2-container--default .select2-selection--single .select2-selection__arrow b{margin-top:0}.select2-dropdown .select2-search__field,.select2-search--inline .select2-search__field{border:1px solid #d2d6de}.select2-dropdown .select2-search__field:focus,.select2-search--inline .select2-search__field:focus{outline:none}.select2-container--default.select2-container--focus .select2-selection--multiple,.select2-container--default .select2-search--dropdown .select2-search__field{border-color:#3c8dbc !important}.select2-container--default .select2-results__option[aria-disabled=true]{color:#999}.select2-container--default .select2-results__option[aria-selected=true]{background-color:#ddd}.select2-container--default .select2-results__option[aria-selected=true],.select2-container--default .select2-results__option[aria-selected=true]:hover{color:#444}.select2-container--default .select2-selection--multiple{border:1px solid #d2d6de;border-radius:0}.select2-container--default .select2-selection--multiple:focus{border-color:#3c8dbc}.select2-container--default.select2-container--focus .select2-selection--multiple{border-color:#d2d6de}.select2-container--default .select2-selection--multiple .select2-selection__choice{background-color:#3c8dbc;border-color:#367fa9;padding:1px 10px;color:#fff}.select2-container--default .select2-selection--multiple .select2-selection__choice__remove{margin-right:5px;color:rgba(255,255,255,0.7)}.select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover{color:#fff}.select2-container .select2-selection--single .select2-selection__rendered{padding-right:10px}

Editing File: AdminLTE-select2.min.css