How to change colour of graphs in Visualizer

The color of the graphs can be changed. Before the color change:

After you have created a chart, go to Visualizer > Chart Library.

Click edit on the chart already created, select your chart, and on the next page, click settings.

Go to Series Settings and there will be your categories.

Click on your category and in the end, you'll find an option: Color.

Choose the color of your choice and click Save Chart. The colors will be changed on your chart now.

After the color change: