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This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

In Mozilla applications like Firefox, the -moz-border-left-colors CSS property sets a list of colors for the left border.

/* Single <color> value */
-moz-border-left-colors: #f0f0f0;

/* Multiple <color> values */
-moz-border-left-colors: #f0f0f0 #a0a0a0 #505050 #000000;

/* Global values */
-moz-border-left-colors: inherit;
-moz-border-left-colors: initial;
-moz-border-left-colors: unset;

When an element has a border that is larger than a single CSS pixel, each line of pixels uses the next color specified in this property, from the outside in. This eliminates the need for nested boxes. If the border is wider than the number of specified colors, the remaining part of the border is the innermost color specified.

Initial valuenone
Applies toall elements
Computed valueas specified
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

It does not apply

  1. if border-style is dashed or dotted.
  2. to tables with border-collapse: collapse.



Accepts a white-space separated list of color values.

Specifies the color of a line of pixels of the left border. transparent is valid. See <color> values for possible units.
Default, no colors are drawn or border-color is used, if specified.

Formal syntax

[ <color> ]* <color> | none

<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>

<rgb()> = rgb( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<rgba()> = rgba( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<hsl()> = hsl( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<hsla()> = hsla( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )

<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>


<div id="example">Example</div>
#example {
  padding: 20px;
  background-color: gray;
  border: 10px solid black;
  -moz-border-top-colors: #e00 #c30 #c50 #c60 #c70 #c80 #c90 #ca0 #cb0 #cc0;
  -moz-border-right-colors: red #f60 #f80 #f90 #fa0 #fb0 #fc0 #fd0 #fe0 #ff0;
  -moz-border-bottom-colors: red #f60 #f80 #f90 #fa0 #fb0 #fc0 #fd0 #fe0 #ff0;
  -moz-border-left-colors: #e00 #c30 #c50 #c60 #c70 #c80 #c90 #ca0 #cb0 #cc0;


This property is not part of any specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No No1 — 591 2 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No No4 — 591 2 No No No

1. In Firefox 59, the property was limited to usage in chrome code only (See bug 1417200).

2. In Firefox 60, the property was removed completely (See bug 1429723).

See also

Метки документа и участники

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