I have used optimizely's default dijit/ColorPalatte to add a color picker property.This works just fine but only shows limited colors.
I have tried adding a custom Editor to add custom colors but it does not work.
Here's my complete block and editor descriptor.

using EPiServer.DataAbstraction;
using EPiServer.DataAnnotations;
using EPiServer.Shell.ObjectEditing;
using EPiServer.Shell.ObjectEditing.EditorDescriptors;
using System.ComponentModel.DataAnnotations;
using xxx.EpiServer.DataAbstraction;

namespace xxx.EpiServer.Models.Blocks
{
    [ContentType(DisplayName = "Color Palette Block", GUID = "1b0d0535-e0cb-4fe0-b179-81e72b8ccb6e",
        Description = "Used to create Color Palette block", GroupName = SystemBlockCategoryNames.Widget)]
    [SiteImageUrl]
    public class ColorPaletteBlock : SiteBlockData
    {
        [Display(Name = "Color", Description = "Used to add Color", GroupName = SystemTabNames.Content, Order = 100)]
        [EditorDescriptor(EditorDescriptorType = typeof(ColorPaletteEditorDescriptor))]
        [UIHint("ColorPalette")]
        public virtual string Color { get; set; }
    }

    [EditorDescriptorRegistration(TargetType = typeof(string), UIHint = "ColorPalette")]
    public class ColorPaletteEditorDescriptor : EditorDescriptor
    {
        public override void ModifyMetadata(ExtendedMetadata metadata, IEnumerable<Attribute> attributes)
        {
            ClientEditingClass = "dijit/ColorPalette";
            metadata.EditorConfiguration["palette"] = new string[]
            {
                "#FF0000", // Red
                "#00FF00", // Green
                "#0000FF", // Blue
                "#FFFF00", // Yellow
                "#FFA500", // Orange
                "#800080", // Purple
                "#000000", // Black
                "#FFFFFF"  // White
            };
            base.ModifyMetadata(metadata, attributes);
        }
    }
}

When i adding this new color palette block,its empty. Is there something that is missing in the editor? I have tried 2dimensional array instead of this single array for colors but none works. Is there a way to customize the color.

Any input is appreciated.

Regards.