HTML meter tag understanding and color change rules

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The max and minattributes of the meter tagare defined on the two sides, low and high is defined in the middle.

This divides 3 intervals.

The difference between optimal value and value determines the different colors displayed.

The rule is:

If the value value is in the same range as the optimal value, it will be displayed in green;

Then value values ​​that are not in the same interval as the optimal value are centered on the interval where the optimal value is located, and the intervals to the left and right are colored yellow and red in sequence.

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