ASP.NET Color Picker - Custom colors

Click to the box:
Color Picker
Previous color:

Custom colors can be added to the default palettes of Color Picker.

Example code

<obout:ColorPicker runat="server" OnClientPicked="OnColorPicked" Id="picker" PickButton="false"
       TargetId="color" TargetProperty="style.backgroundColor" CustomColorsInLine="12" >
      <asp:TextBox readOnly="true" id="color" style="cursor: pointer;" runat="server"/>
      <obout:CustomColors runat="server">
            <Collection>
                  <obout:CustomColor Value="TRANSPARENT" Title="transparent" />
                  <obout:CustomColor Value="#FFFF00" />
                  ...
                  <obout:CustomColor Value="#FFFFFF" />
            </Collection>
      </obout:CustomColors>
</obout:ColorPicker>

See the full source code in /ColorPicker/aspnet_CustomColors.aspx file of downloaded Suite.