Change the color of highlighted/selected text

Question

I would like to change the color of highlighted text on my page.

Currently, this is how I am approaching this:

::selection, ::-moz-selection {
    background-color: #ffffff;
}

Unfortunately, I am running into problems where I am unable to change the background color of highlighted text if strings are separated by a linebreak, like so:

Hello
  World

An example of this can be found on my current web application project: http://term.qt.io by doing CTRL+A (Select-All for most browsers) to highlight all the text. You will notice that it appears gray in some areas but blue in others. I would like all the highlighted text to be a gray background rather than blue in some areas.

Answer 1

The use of the span is what's breaking it. Coding it like this works fine:

<p class="prompt">Welcome to term.
    <br>
    <br>
    login as: <span class="input blinker">&nbsp;</span>
</p>

And it's better semantics IMO.