Borders
Outline Color 
Utilities for controlling the color of an outline of an element.
s-prefix
The s- (semantic) prefix signals that the color value of these will change with the brand css.
Quick reference 
Basic usage 
Setting the outline color 
Control the outline color of an element using the s-outline-{semantic color} utilities specified in the table above.
<div class="s-outline-focus outline-4 ..."></div>Arbitrary values 
If you need to use a one-off outline-{color} value, use square brackets to generate a property on the fly using any arbitrary value. However, we recommend only using our semantic color tokens.
<div class="outline-[--w-s-color-border]">
  <!-- ... -->
</div>Opacity 
It is possible to control the opacity of an element’s outline color by adding an optional alpha modifier. The modifier accepts any integer percentage value between 0 and 100. This works for both semantic and arbitrary classes with any primitive --w-{color} or semantic --w-s-color-{name} css variable.
Warning
Please be advised that by using primitive variables you will lose theming possibilities, therefore we highly recommend only using semantic classes and tokens.
<div class="s-outline/50 hover:s-outline/100 ..."></div>
<div class="s-outline-focus/50 hover:s-outline-focus/100 ..."></div>
<div class="outline-[--w-s-color-background-positive/40] hover:bg-[--w-s-color-background-positive/100] ..."></div>
<div class="outline-[--w-black/40] hover:outline-[--w-black/100] ..."></div>Applying conditionally 
Hover, focus and other states 
Conditionally apply utility classes in different states using variant modifiers. For example, use hover:s-outline-active to only apply the s-outline-active utility on hover.
<div class="s-outline hover:s-outline-hover ..."></div>Breakpoints and media queries 
You can also use variant modifiers to target media queries like responsive breakpoints, dark mode, prefers-reduced-motion, and more. For example, use md:s-outline-positive to apply the s-outline-positive utility at only medium screen sizes and above.
<div class="s-outline md:s-outline-positive ..."></div>