The Flutter range column chart is used to display a range of data by plotting two y-values per data point. Each y-value used in the range column chart is drawn as the upper and lower bounds of a column.
The range column chart provides an option to customize the spacing between two rectangles.
Modernize the UI by applying rounded corners to the range column chart.
Applies gradient colors to visualize data in different colors, improving the readability and appearance of a chart.