Currently the heat map insight only allows for one color to be selected which becomes darker in nature as values increase. This is great if we are trying to identify what may be the largest contributor to an overall number BUT heat maps could be used in another way as well. If divergent colors were incorporated (two different colors at opposite ends of a number range), it would allow the user to evaluate 'good' versus 'bad' quite quickly, adding an entirely new use-case for the insight. In addition to this, allowing the range of numbers for this coloring to be negative may be a good idea. An example of this is if the measure indicates performance relative to target. If target is achieved (positive value) the color is closer to green. If target is missed, (negative value) the color is closer to red. The more significant the deviation from target (zero), the darker the color.