Using the Columns property you can organize the colors in the palette so they are rendered in appropriate color groups. By default, setting a Preset will automatically set the appropriate Columns property value so that the preset palette is rendered correctly. If you have a custom color collection, you can arrange the colors by setting the appropriate Columns property value.

CopyXML

<telerik:RadColorPicker runat="server" ID="RadColorPicker1" Preset="Grayscale" />

Displays as:

CopyXML

<telerik:RadColorPicker runat="server" ID="RadColorPicker1" Preset="Grayscale" Columns="8"/>

Displays as: