This doesn't seem to have a lot of granularity in color around the 0 mark. Above 0 we have a warm color, below 0 we have a cold color. Would it paint a more inf

This doesn't seem to have a lot of granularity in color around the 0 mark. Above 0 we have a warm color, below 0 we have a cold color. Would it paint a more informative picture to give +/-(relevant fraction) a distinct color?