colors.fromNumber
The lower range value of the applied color.
Example
<div id="progressbar"></div>
<script>
$("#progressbar").kendoCircularProgressBar({
value: 60,
colors: [{
from: 0,
to: 30,
color: '#e74c3c'
}, {
from: 30,
to: 70,
color: '#f39c12'
}, {
from: 70,
to: 100,
color: '#2ecc71'
}]
});
</script>