I can't find a way to get rid of the default gradient backcolor of the raddock control. I've tried the following:
spltContainer.Style.SetValue(Telerik.WinControls.Primitives.FillPrimitive.GradientStyleProperty, Telerik.WinControls.GradientStyles.Solid)
And it has no effect. I've even tried getting the FillPrimitive child, and setting it's GradientStyle to Solid, but it just get's overwritten (if I set the value using RadControlSpy it works).