::selection {
color: #000000;
background-color: red;
}
/* for firefox */
::moz-selection {
color: #000000;
background-color: red;
}::selection {
background-color: cyan;
}/*** Works on common browsers ***/
::selection {
background-color: #352e7e;
color: #fff;
}
/*** Mozilla based browsers ***/
::-moz-selection {
background-color: #352e7e;
color: #fff;
}
/***For Other Browsers ***/
::-o-selection {
background-color: #352e7e;
color: #fff;
}
::-ms-selection {
background-color: #352e7e;
color: #fff;
}
/*** For Webkit ***/
::-webkit-selection {
background-color: #352e7e;
color: #fff;
}
/* Make selected text gold on a red background */
::selection {
color: gold;
background-color: red;
}
/* Make selected text in a paragraph white on a blue background */
p::selection {
color: white;
background-color: blue;
}
p.normal::selection {
background: #cc0000;
color: #fff;
}
p.moz::-moz-selection {
background: #cc0000;
color: #fff;
}
<select>
<option value="tesla">Tesla</option>
<option value="volvo">Volvo</option>
<option value="mercedes">Mercedes</option>
</select">