There is a color picker in Vitara charts which is used to set colors to fonts, markers, series, etc.
Let us consider we set a series color for one of the series in a chart to ‘red’(#ff0000).See the screenshot.
Now to reset this series color to ‘Auto’ i.e. to the default color, just remove the color for that series as in the screenshot below:
In this way, we can reset all the color properties in color palette, thresholds, chart background, series colors, label colors, line colors, marker colors, etc.