Hi @ReneMolenaar and @lagapidis ,
I have tested this with my lab.Service VPN is working fine.But I have some confusion because in my main dashboard it said partial wan connectivity.when I dig deeper I found that BFD sessions between two colors are down.
As far as I know WAN edge routers try to form overlay tunnels to every received TLOC from a different site using every available color.So can you please help me to understand this issue.Your help is highly appriciated
Update 
Actually after I configure default route from both vEdge routers Full WAN connectivity obtained.
But If I create static routes to obtain the same connectivity it is not working…
For a example :
If create following summery routes insted of defult route BFD is down between two colors.
ip route 10.65.0.0/16 10.65.91.100
ip route 10.65.0.0/16 10.65.92.100
Can you please explain what is the logic here …