Select menu css style

index.html

<div class="select_box">
  <select id="test">
    <!-- options here -->
  </select>
</div>

style.css

.select_box .ui-selectmenu-button, .select_box .date_picker {
  min-width: 150px;
  background: #f4f4f5;
  border: 1px solid #f4f4f5;
  max-height: 52px;
}
.select_box.min_none .ui-selectmenu-button, .select_box .date_picker {
  min-width: auto;
}
.grey_form .label_box .form-control {
  background: #fff;
}
.grey_form .select_box .ui-selectmenu-button,
.grey_form .select_box .date_picker {
  background: #fff;
}
.select_box .ui-selectmenu-button span.ui-selectmenu-text {
  font-size: 14px;
  color: #252525;
  font-weight: 600;
  /* padding: 26px 50px 8px 20px; */
}
.space_center.select_box .ui-selectmenu-button span.ui-selectmenu-text {
  padding: 17px 2.1em 17px 1em;
}
.label_box:hover .remove_input {
  opacity: 1;
  visibility: visible;
}
.select_box .ui-icon, .select_box .ui-widget-content .ui-icon {
  background: url("icon.svg") no-repeat;
  background-size: 12px;
  opacity: .5;
}
.select_box .ui-selectmenu-button-open .ui-icon, .select_box .ui-selectmenu-button-open .ui-widget-content .ui-icon {
  margin-top: -10px;
  transform: rotate(180deg);
}
.select_box.has_no_vlaue label{
  padding: 17px 2.1em 17px 1em;
  font-size: 14px;
  color: #252525;
  font-weight: 600;
  padding: 10px 0;
  transition: all .5s;
}
.ui-selectmenu-menu .ui-menu-item.no_value {
  display: none;
}
.select_inline .ui-selectmenu-button span.ui-selectmenu-text{
  font-size: 14px;
  line-height: 19px;
  color: #001225;
  font-weight: 400;
  padding: 0;
}
.select_inline .ui-selectmenu-button{
  background-color: transparent;
  padding: 0 15px 0 0;
  margin-top: -7px;
}
.select_inline .ui-selectmenu-button span.ui-icon {
  right: 0;
  background-image: url("<%= asset_path 'arrow_down_dark_fill.svg' %>");
  background-size: 7px;
  /* background-position: center right; */
  background-position: center;
  margin-top: -7px;

}
.select_md_box .ui-selectmenu-button span.ui-selectmenu-text {
  font-size: 12px;
  line-height: 16px;
  color: #7D7D7D;
  padding: 5px 44px 5px 10px;
}
.select_md_box .ui-selectmenu-button{
  background: #FBFBFB;
  border: 1px solid #EBEAEF;
  box-sizing: border-box;
  border-radius: 4px;
}
.select_md_box {
  padding-right: 10px;
}
.select_md_box .ui-selectmenu-button span.ui-icon {
  right: 7px;
  margin-top: -7px;
  background-position: center;
  background-size: 11px;
}
.ui-selectmenu-button-open span.ui-icon{
  transform: rotate(180deg);
}