Hello Dean,
I tried to reproduce the described behavior on the online demo
ColorPicker / First Look, but to no avail. Please check
this screen capture and verify if I am missing something in order to recreate your scenario.
Nevertheless, you can reference the color input textbox via the RadColorPicker's Client API and then you can disable the backspace button on the
keydown event of this textbox. I have attached a sample page, implementing the suggested approach. You can refer to it for incorporating this feature into your actual project.
I hope that helps. Please let us know if you encounter additional difficulties.
Best wishes,
Slav
the Telerik team
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