::-webkit-meter-suboptimum-value

Non-standard
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.

The ::-webkit-meter-suboptimum-value pseudo-element gives a yellow color to the <meter> element when the value attribute falls outside of the low-high range.

Specifications

Not part of any specification. This is a proprietary pseudo-element specific to WebKit/Blink.

Example

HTML

<meter min="0" max="10" value="6">Score out of 10</meter>

CSS

meter::-webkit-meter-suboptimum-value {
  background: -webkit-gradient linear, left top, left bottom;
  height: 100%;
  box-sizing: border-box;
}

Result

Note: This will only work in Webkit/Blink-based browsers.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
::-webkit-meter-suboptimum-value
Non-standard
Chrome Full support 12Edge No support NoFirefox No support NoIE No support NoOpera Full support 15Safari Full support 5.1WebView Android Full support ≤37Chrome Android Full support 18Firefox Android No support NoOpera Android Full support 14Safari iOS Full support 5Samsung Internet Android Full support 1.0

Legend

Full support  
Full support
No support  
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also

The pseudo-elements used by WebKit/Blink to style other parts of a <meter> element are as follows: