Thank you the question.
The minimize/maximize/close buttons are controlled by images, so regardless of the color setting that you apply, you are again observing the same style and behavior. You can edit the buttons states removing the images by using our Visual Style Builder tool. Here you can read more about loading our predefined themes in case you want to start from an existing theme.
Alternatively, if you are happy with the images that appear by default when the mouse is not over and not down on the buttons, you can override the MouseOver and MouseDown images set by theme by explicitly setting the default image in code like this:
In addition, you might want to set the border to the same DarkBlue color as the fill. Moreover, in order to increase the height of the titlebar, I would recommend setting its Padding
to an appropriate value:
Padding(0, 50, 0, 50);
.FormElement.TitleBar.FillPrimitive.BackColor = Color.DarkBlue;
.FormElement.TitleBar.FillPrimitive.GradientStyle = Telerik.WinControls.GradientStyles.Solid;
.FormElement.TitleBar.BorderPrimitive.BoxStyle = Telerik.WinControls.BorderBoxStyle.SingleBorder;
.FormElement.TitleBar.BorderPrimitive.ForeColor = Color.DarkBlue;
I hope this helps. Let me know if you need additional assistance.
the Telerik team