I tried following code - but the Font/Color properties are all ignored when Tab renders. Only main BackColor property showed background color. But Font-Bold, Font-Size, HoveredCssClass are all being ignored.
<telerik:RadTabStrip ID="rts1" runat="server"
Orientation="HorizontalTop"
Skin="Vista"
BackColor="Orange"
Font-Bold="true"
Font-Size="Large"
>
<Tabs>
<telerik:RadTab Text="Tab 1" Font-Size="Large" Font-Bold="true" BackColor="Red" HoveredCssClass="hovered" />
<telerik:RadTab Text ="Tab 2" Font-Size="Large" Font-Bold="true" />
</Tabs>
</telerik:RadTabStrip>
<telerik:RadTabStrip ID="rts1" runat="server"
Orientation="HorizontalTop"
Skin="Vista"
BackColor="Orange"
Font-Bold="true"
Font-Size="Large"
>
<Tabs>
<telerik:RadTab Text="Tab 1" Font-Size="Large" Font-Bold="true" BackColor="Red" HoveredCssClass="hovered" />
<telerik:RadTab Text ="Tab 2" Font-Size="Large" Font-Bold="true" />
</Tabs>
</telerik:RadTabStrip>