Sidebar categories color

He guys, now, this code gives me exactly the output I want in the sidebar.

Thing is, I would like to have each of these 3 categories in a different color.

Do I have to make a list and sort stuff new or is there a possibility to add different link/hover/visited colors via stylesheet right in this code?

I read the ‘Customizing your sidebar’ stuff and all that but it’s a little much at once.

Thank you so much for your help!

<div id="sidebar">
<ul>
<?php wp_list_categories('orderby=name&child_of=1&title_li='); ?>
</ul>
<br />
<ul>
<?php wp_list_categories('orderby=name&child_of=3&title_li='); ?>
</ul>
<br />
<ul>
<?php wp_list_categories('orderby=name&child_of=4&title_li='); ?>
</ul>
</div>