That combination of options is invalid.
$mds-visualization-color-correlation-negativeto represent the range including the edge value (1 and −1 respectively). The subsequent ranges in each should utilize tints of the base color. These tints can be adjusted to match the distribution of the number of ranges, i.e., 25% tints could be used with 8 total legend items, while 30% may be more appropriate with 6 total legend items.
300pxand heights below
150pxas small sizes do not provide enough space for axis values and the legend to properly display.
Necessary code documentation can be found in the MBC repository.