mempool/frontend/src/app/components/transactions-list/transactions-list.component.scss

.header-bg {
  font-size: 14px;
}

.arrow-td {
	width: 22px;
}

.arrow {
	display: inline-block!important;
	position: relative;
	width: 14px;
	height: 22px;
	box-sizing: content-box
}

.arrow:before {
	position: absolute;
	content: '';
	margin: auto;
	top: 0;
	bottom: 0;
	left: 0;
	right: calc(-1*30px/3);
	width: 0;
  height: 0;
	border-top: 6.66px solid transparent;
  border-bottom: 6.66px solid transparent
}

.arrow:after {
	position: absolute;
	content: '';
	margin: auto;
	top: 0;
	bottom: 0;
	left: 0;
	right: calc(30px/6);
	width: calc(30px/3);
	height: calc(20px/3);
	background: rgba(0, 0, 0, 0);
}

.arrow.green:before {
  border-left: 10px solid #28a745;
}
.arrow.green:after {
  background-color:#28a745;
}

.arrow.red:before {
  border-left: 10px solid #dc3545;
}
.arrow.red:after {
  background-color:#dc3545;
}

.arrow.grey:before {
  border-left: 10px solid #6c757d;
}

.arrow.grey:after {
  background-color:#6c757d;
}