Examples

Basic example

Use utilities likeoutline-rose-500 andoutline-lime-100 to control the color of an element's outline:

<button class="outline-2 outline-offset-2outline-blue-500 ...">Button A</button><button class="outline-2 outline-offset-2outline-cyan-500 ...">Button B</button><button class="outline-2 outline-offset-2outline-pink-500 ...">Button C</button>

Changing the opacity

Use the color opacity modifier to control the opacity of an element's outline color:

<button class="outline-2 outline-blue-500/100 ...">Button A</button><button class="outline-2 outline-blue-500/75 ...">Button B</button><button class="outline-2 outline-blue-500/50 ...">Button C</button>

Using a custom value

Use theoutline-[<value>] syntax to set the outline color based on a completely custom value:

<div class="outline-[#243c5a] ...">  <!-- ... --></div>

For CSS variables, you can also use theoutline-(<custom-property>) syntax:

<div class="outline-(--my-color) ...">  <!-- ... --></div>

This is just a shorthand foroutline-[var(<custom-property>)] that adds thevar() function for you automatically.

Responsive design

Prefix anoutline-color utility with a breakpoint variant likemd: to only apply the utility at medium screen sizes and above:

<div class="outlinemd:outline-blue-400 ...">  <!-- ... --></div>

Learn more about using variants in thevariants documentation.

Customizing your theme

Use the--color-* theme variables to customize the color utilities in your project:

@theme {  --color-regal-blue:#243c5a;}

Now theoutline-regal-blue utility can be used in your markup:

<div class="outline-regal-blue">  <!-- ... --></div>

Learn more about customizing your theme in thetheme documentation.