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In the ChartControl, colors can be used in different ways to enhance the chart's appearance, distinguish different series, point out or draw attention to data information such as averages, and more.

Color Palettes

The ChartControl includes several pre-defined color palettes that can be used to automatically set the colors for data values in a series. The pre-defined palettes are as follows.

• Default The default palette.
• Cascade A cascade of eight cool colors ranging from deep teal down through pale orchid.
• Springtime The colors of spring, in deep green, two vivid colors and five pastels.
• Iceberg A range of the soft blues and greys found in an iceberg.
• Confetti A sprinkling of bright and pastel colors.
• Greens A palette of greens.
• Berries The colors of berries.
• Autumn A quiet palette of autumn colors.
• Murphy A range of the soft blues and greens.

These enumerated values are accessed through the Series class with code like the following.

To write code in Visual Basic.NET

Me.ChartControl1.Series(0).ColorPalette = Chart.ColorPalette.Iceberg

To write code in C#

this.ChartControl1.Series[0].ColorPalette = GrapeCity.ActiveReports.Chart.ColorPalette.Iceberg;

Gradients

Gradients can be used in object backdrops to enhance the visual appearance of various chart items. Gradients can be used in the following chart sections:

• Chart
• Chart area
• Wall
• Title
• Legend
• Legend item (for custom legend items)
• WallRange
• Series
• Data point
• Marker
• Marker Label
• Annotation TextBar

You can set gradients for a backdrop at run time by creating a BackdropItem, setting its Style property to Gradient, setting the GradientType, and setting the two colors to use for the gradient as shown in the following example.

To write code in Visual Basic.NET

Imports GrapeCity.ActiveReports.Chart.Graphics

Dim bItem As New GrapeCity.ActiveReports.Chart.BackdropItem
bItem.Style = Chart.Graphics.BackdropStyle.Gradient
bItem.Gradient = Chart.Graphics.GradientType.Vertical
bItem.Color = Color.Purple
bItem.Color2 = Color.White
Me.ChartControl1.Backdrop = bItem                       

To write code in C#

using GrapeCity.ActiveReports.Chart.Graphics;

GrapeCity.ActiveReports.Chart.BackdropItem bItem = new GrapeCity.ActiveReports.Chart.BackdropItem();
bItem.Style = GrapeCity.ActiveReports.Chart.Graphics.BackdropStyle.Gradient;
bItem.Gradient = GrapeCity.ActiveReports.Chart.Graphics.GradientType.Vertical;
bItem.Color = System.Drawing.Color.Purple;
bItem.Color2 = System.Drawing.Color.White;
this.ChartControl1.Backdrop = bItem;