How to style drop down list?

This question already has an answer here:

Check this out - http://bavotasan.com/2011/style-select-box-using-only-css/

html

<div class="styled-select">
   <select>
      <option>Here is the first option</option>
      <option>The second option</option>
   </select>
</div>

css

.styled-select select {
   background: transparent;
   width: 268px;
   padding: 5px;
   font-size: 16px;
   line-height: 1;
   border: 0;
   border-radius: 0;
   height: 34px;
   -webkit-appearance: none;
}

For more elaborate styling you need to use javascript - like this http://tympanus.net/codrops/2012/10/04/custom-drop-down-list-styling/

If what you mean is "How can I style the selectable options in a form element?", then you're gonna have a hard time. You cannot use pure CSS to achieve that. You could create an "