I'm not sure what color of envelopes I should use for our invites and RSVPs. Our pocketfolds are black.. our colors are green, royal blue, black, and white. I was thinking of a black envelope with a green rsvp envelope but I can't find a green that I like besides at paper zone and i don't remember their prices.. anyway.. what color do you think??
also, if the mat behind the invitation doesn't matche perfectly to the envelope for the rsvp.. do you think people will notice? or should i just go with a blue envelope so it doesn't clash?
TIA!

we're having twins!