Sharepoint Master page Css issue

I have a master page in Sharepoint 2013 when i preview that in browser I see this line added

<style type="text/css">
     .ui-dialog-titlebar,.ms-dlgTitle,#s4-ribbonrow
         {
            background-color:rgb(0, 113, 198)  ! important;    
         }
</style>

While as this is not added any where , because of this my title of all pop up are coming blue.