html tutorial - How to change the default text selection color in the browsers using CSS - html5 - html code - html form

You'll be able to override this setting with the CSS ::selection pseudo-element and With the most of the browsers highlights the chosen text in blue background.

Currently browsers only support alittle subset of CSS properties for ::selection pseudo-element like color, background-color and text-shadow.

::selection {
    color: #fff;
    background: #87cefa;
    text-shadow: 1px 1px 2px #b040b0;
}
/* For Mozilla Firefox */
::-moz-selection {
    color: #fff;
    background: #87cefa;
    text-shadow: 1px 1px 2px #b040b0;
}