.arrow {
  width: 12px;
  height: 12px;
  position: relative;
  display: inline-block;
  margin: 0px 5px 0px 5px;
}
.arrow:before, .arrow:after {
  content: "";
  border-color: transparent;
  border-style: solid;
  position: absolute;
}

.arrow-up:before {
  border: none;
  background-color: green;
  height: 50%;
  width: 30%;
  top: 50%;
  left: 35%;
}
.arrow-up:after {
  left: 0;
  top: -50%;
  border-width: 6px 6px;
  border-bottom-color: green;
}

.arrow-right:before {
  border: none;
  background-color: orange;
  height: 30%;
  width: 50%;
  top: 35%;
  left: 0;
}
.arrow-right:after {
  left: 50%;
  top: 0;
  border-width: 6px 6px;
  border-left-color: orange;
}

.arrow-down:before {
  border: none;
  background-color: red;
  height: 50%;
  width: 30%;
  top: 0;
  left: 35%;
}
.arrow-down:after {
  left: 0;
  top: 50%;
  border-width: 6px 6px;
  border-top-color: red;
}