.panel-heading .panel-title > a {
  border-left:15px solid #75b726;
}

.panel-heading .panel-title > a.accordion-toggle:before,
.panel-heading .panel-title > a.accordion-toggle.collapsed:before {
  content: "\e813";
  color:#75b726;
  top:17px;
}
.panel-heading .panel-title > a.accordion-toggle.collapsed:before {
  color:#b7b7b7;
}
.panel-group .panel-heading + .panel-collapse > .panel-body {
  border-left:15px solid #75b726;
}
@media screen and (max-width: 767px) {
.panel-heading .panel-title > a.accordion-toggle:before,
.panel-heading .panel-title > a.accordion-toggle.collapsed:before {
  top:14px;
}
}