CSS provides several properties that allow you to style links (i.e., <a> elements) in your HTML documents. Here are some examples:

1. color: This property allows you to specify the color of the link text. You can use any of the methods for specifying colors in CSS (such as predefined color names, hexadecimal codes, RGB values, or HSL values).

a {
    color: blue;
}

2. text-decoration: This property allows you to specify the appearance of decorative lines that are added to the link text. The possible values are none, underline, overline, line-through, and blink.

a {
    text-decoration: none;
}

3. :hover pseudo-class: This pseudo-class allows you to specify styles for a link when the user’s mouse pointer is hovering over it. For example:

a:hover {
    color: red;
    text-decoration: underline;
}

4. :active pseudo-class: This pseudo-class allows you to specify styles for a link when it is being activated (e.g., clicked or tapped). For example:

a:active {
    color: green;
}

5. :visited pseudo-class: This pseudo-class allows you to specify styles for a link that has been visited by the user. For example:

a:visited {
    color: purple;
}

You can use these properties and pseudo-classes, either individually or in combination, to style links in your HTML documents. It’s a good idea to familiarize yourself with all of these properties and pseudo-classes so that you can choose the most appropriate ones for your needs.