You can set text selection background and color using css selection styles. There are three types of selection code namely ::selection, ::-moz-selection and ::-webkit-selection. It’s not necessary to use the last ::-webkit-selection.

Set Color for Text Selection

CSS Code

/* Mozilla Based Browsers */
::-moz-selection {
       background-color: #4588e2;
       color: #000;
}

/* For Safari Based Browsers*/
::selection {
       background-color: #4588e2;
       color: #000;
}

You can extend the code further and create color for different paragraph classes. See the full code below.

/* Mozilla Based Browsers */
::-moz-selection {
       background-color: #4588e2;
       color: #000;
}

/* For Safari Based Browsers*/
::selection {
       background-color: #4588e2;
       color: #000;
}

/* Individual Paragraph Styling*/
p.orange::selection {
	background: #ffcc19;
}
p.orange::-moz-selection {
	background: #ffcc19;
}
p.green::selection {
	background: #1fb70f;
}
p.green::-moz-selection {
	background: #1fb70f;
}
p.pink::selection {
	background: #ef4686;
}
p.pink::-moz-selection {
	background: #ef4686;
}

HTML

<p>
Default text selection color. Default text selection color. Default text selection color. Default text selection color. Default text selection color. Default text selection color. Default text selection color.
</p>

<p class="orange">
Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange.
</p>

<p class="green">
Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green.
</p>

<p class="pink">
Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink.
</p>

Demo

Default text selection color. Default text selection color. Default text selection color. Default text selection color. Default text selection color. Default text selection color. Default text selection color.

Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange. Lines of orange.

Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green. Lines of green.

Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink. Lines of pink.