binding - BindingExpression path error itemtemplate -


i using following itemtemplate in tabcontrol set content of tab item , foreground color of tab item. both properties available in same viewmodel class: 

       <tabcontrol.itemtemplate>             <datatemplate>                 <dockpanel>                     <contentpresenter                          content="{binding path=name, updatesourcetrigger=propertychanged}"                         textelement.foreground="{binding path=color, converter={converter:colortobrushconverter}, updatesourcetrigger=propertychanged}"/>                 </dockpanel>             </datatemplate>         </tabcontrol.itemtemplate>

as 'name' property works expected. when property modified name on tab item changes. 'color' property not work. keep getting

system.windows.data error: 40 : bindingexpression path error: 'color' property not found on 'object' ''string' (hashcode=2145491359)'. bindingexpression:path=color; dataitem='string' (hashcode=2145491359); target element 'contentpresenter' (name=''); target property 'foreground' (type 'brush')

when setting textelement.foreground constant color, e.g. "white", works.

what's wrong binding?


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