Wijmo gauges are composed of Range objects. Range objects have "min" and "max" properties the define the extent of the range, as well as "thickness" and "color" properties that define the appearance of the range.
Every gauge has at least two ranges, the "face" and the "pointer":
In addition to these two special ranges, gauges may have any number of additional ranges added to their "ranges" collection. These additional ranges can be used in two ways:
By default, extra ranges appear as part of the gauge background. This way you can show 'zones' within the gauge, like 'good', 'average', and 'bad' for example. If you set the gauge's "showRanges" property to false, the additional ranges are not shown. Instead, they are used to automatically set the color of the "pointer" range based on the current gauge value: