CSS border-left-color Property

What You’ll Learn

The border-left-color property sets the color of the border on the physical left side only.

Definition and Usage

The border-left-color CSS property sets the color of the border on the physical left side of an element. It is a longhand of border-left and works alongside border-left-width and border-left-style.

Unlike logical properties such as border-inline-start-color, border-left-color always targets the physical left edge — even in RTL text. That makes it straightforward for classic LTR layouts and left accent dividers.

📝 Syntax

border-left-color accepts any valid CSS color value:

selector {
  border-left-color: color;
}

Basic Example

div {
  border: 5px solid black;
  border-left-color: red;
}

Syntax Rules

• Accepts named colors, hex, rgb, hsl, currentcolor, and transparent.
• Only affects the left border side; other sides keep their own colors.
• You need a visible border width and style for the color to appear.
• Always affects the physical left side, regardless of direction or writing-mode.
• Default is currentcolor, matching the element’s text color.

Default Value

The default value of border-left-color is currentcolor. The left border uses the element’s text color unless you set a different color explicitly.

💎 Property Values

Common Value Types

Left Border Color and Text Direction

border-left-color always colors the physical left side. Text direction does not move the border — compare with border-inline-start-color when building RTL layouts.

border-left-color vs related properties

Examples Gallery

Try border-left-color with named colors, hex values, currentcolor, and RTL text.

<style>
  div {
    border: 5px solid black;
    border-left-color: red;
    padding: 10px;
  }
</style>

<div>
  This is a div with a red left border.
</div>

.card {
  border: 3px solid #cbd5e1;
  border-left-color: #2563eb;
  padding: 1rem;
  background: #eff6ff;
}

.quote {
  color: #7c3aed;
  border: 3px solid #cbd5e1;
  border-left-color: currentcolor;
  padding: 0.75rem 1rem;
}

<style>
  .rtl-box {
    direction: rtl;
    border: 3px solid #cbd5e1;
    border-left-color: #059669;
    padding: 0.75rem 1rem;
    background: #ecfdf5;
  }
</style>

<div class="rtl-box">
  حد فيزيكي على اليسار
</div>

💡 Best Practices