css dropdown arrow code example

Example 1: arrow down css

.arrow-down {
  width: 0; 
  height: 0; 
  border-left: 75px solid transparent;
  border-right: 75px solid transparent;
  border-top: 75px solid #f00;
}

Example 2: change select arrow css

select {
    width: 268px;
    padding: 5px;
    font-size: 16px;
    line-height: 1;
    border: 0;
    border-radius: 5px;
    height: 34px;
    background: url(http://cdn1.iconfinder.com/data/icons/cc_mono_icon_set/blacks/16x16/br_down.png) no-repeat right #ddd;
    -webkit-appearance: none;
    background-position-x: 244px;
}