feature request: set colors based on differences between values

[Human]

In your example usage, you show a temperature regulation example. I would like to use it for the same, but I think it'd help to use color codes as indicators that the current temperature undershoots the target, overshoots, or is within the target range. We might use green for "in range", blue for "current temperature is too cold for set target", red for "current temperature is too hot for set target."