Hi.
First create vlan
#create vlan Blue tag 666
#create vlan Red tag 777
Second remove the default vlan from the port
#configure vlan default del port 42
Third add port to the vlan as you need
#configure vlan Blue add port 42 untagged
#configure vlan Default add port 42 tagged
#configure vlan Red add port 42 taggged
Regards
Z.
Regards
Zdeněk Pala