If you bind the SelectedIndex or the SelectedItem properties to your ViewModel and change them from code, the UI will not be updated. This is both reproducible in ColorPicker, ColorSelector and ColorPaletteView. The issue is fixed in Q2 2014 Release.
Original title: "RadColorPicker should have a built in custom colour selector" I'm aware that I can add a custom colour selector to the RadColorPicker myself and an example is given in the Telerik WPF demos, but rather than having to implement this myself, I'd really expect this to be built in so I could just set a ShowCustomColors="True" flag and it'd be done. Other UI control vendors I have worked with have supported this functionality without making me do so much work.
You can't customize ButtonPart ot TogglePart of SplitButton in ColorPicker as SplitButtonStyle doesn't get applied with this property.
Implicit styles are set via refering included XAML files. Set Style targetting RadColorPicker and BasedOn RadColorPickerStyle. Set this stye in App.xaml after the resource dictionaries. In desinger - MS exception is thrown "This feature requires Microsoft.Windows.Design.Sevices.valueTranslationService". Note that this is only reproducible when xaml fiels are included in the project. This is NOT reproducible when you reference xaml files from the style dll (for example Telerik.Windows.Themes.Office_Black). The fix will be available in our official release Q2 2015 SP.
Add a text field to the Color Picker so be displayed alongside the A. REASON FOR DECLINATION: This Feature Request is declined because the requirement can be easily achieved with the current implementation of the control. You can follow the steps described in this article: http://docs.telerik.com/devtools/wpf/controls/radcolorpicker/howto/how-to-set-custom-content.html
This feature should include: 1. When focused, pressing down arrow key should open the picker, like in WORD's color picker 2. Automatic button should go into keyboard focused state when down arrow is pressed and the focus is in the split button. 3.Arrow keys should move the focus to colors in the pallete views. Space/Enter should select the current color. Feature is mixture of Keyboard logic, new Focus states in PalleteViewItems, PalleteView, ColorSelector, ColorPicker. Like in Ribbon (when keyboard navigation was implemented) some controls might need additional keyboard focused states.