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-optimum-value CSS pseudo-element styles the <meter> element when its value is inside the low-high range.

Green is the default color.


::-webkit-meter-optimum-value {
  /* ... */


Not part of any standard.


This example will only work in browsers based on WebKit or Blink.


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


meter::-webkit-meter-bar {
  /* Required to get rid of the default background property */
  background: none;
  background-color: whiteSmoke;
  box-shadow: 0 5px 5px -5px #333 inset;

meter::-webkit-meter-optimum-value {
  box-shadow: 0 5px 5px -5px #999 inset;


Browser compatibility

BCD tables only load in the browser

See also

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