Change the color of the bottom border with CSS

The border-bottom-color CSS property changes the color of an element's bottom border. This property only affects the color, not the width or style of the border.

Syntax

border-bottom-color: color;

Parameters

The property accepts standard CSS color values including hex codes, RGB values, HSL values, and named colors.

Example

<html>
   <head>
      <style>
         p.demo {
            border: 4px solid black;
            border-bottom-color: #FF0000;
            padding: 10px;
         }
         
         .multiple-colors {
            border: 3px solid;
            border-top-color: blue;
            border-right-color: green;
            border-bottom-color: red;
            border-left-color: orange;
            padding: 15px;
            margin: 10px 0;
         }
      </style>
   </head>
   <body>
      <p class="demo">
         This paragraph has a red bottom border
      </p>
      
      <div class="multiple-colors">
         This div demonstrates different border colors on each side
      </div>
   </body>
</html>

Output

The first paragraph will display with a solid black border on three sides and a red bottom border. The second element shows how you can set different colors for each border side.

Common Use Cases

The border-bottom-color property is commonly used for:

  • Creating accent lines under headings
  • Highlighting active navigation items
  • Adding visual separation between sections
  • Creating custom underline effects

Key Points

  • The element must have a bottom border defined for the color to be visible
  • Works with any valid CSS color value
  • Can be combined with other border properties for custom styling
  • Inherits from the parent element if not explicitly set

Conclusion

The border-bottom-color property provides precise control over bottom border colors. Use it with existing borders to create visual emphasis and improve design aesthetics.

Updated on: 2026-03-15T23:18:59+05:30

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