To change the bar chart’s style, double-click the chart to open the right panel.
You can change the colors of the bars by clicking the color picker for each data series.
To further customize your chart, click the Settings panel, where you can show titles, legends, labels, and change the bar widths and borders.
Each option can be opened to show more by clicking the arrow where you can further customize the option.
When you are done, click Save.