When you update the values, add another attribute boolean ‘Highlighted’. When a value is updated, set Highlighted to true.
Now using dynamic classes, give a class to container widget inside which value is displayed or the value text widget itself based on the condition when Highlighted is true. Now write CSS class to change the background color or text color as you like to make it highlighted.
When your value will change, highlighted attribute on that object will be true and it will apply the highlighted CSS class